Speed, memory and I/O rows, 0.8: x64 (worker) · onemedia docs

Method: bench.md. Ratio = our median / the fastest managed comparator's median on the same file or workload (below 1.00× is faster); the gate is a geometric mean ≤ 1.00× overall and no row above 1.25×. Rows without a managed comparator pass and show our absolute times. Native tools are information.

Machine and versions

Host: worker-x64; AMD Ryzen 9 7950X3D 16-Core Processor; 32 logical cores; Linux Mint 22.3 X64; ISA sse4.2 avx2 bmi2 avx512f avx512bw; runtime 10.0.13 (.NET 10.0.13); storage of the corpus: local NVMe/SSD, every file read once before its rows, so it is in the page cache for all implementations.
Packages as restored: SharpMP4 0.3.2; RecursiveAI.OneAudio 1.7.0; MetadataExtractor 2.9.3; TagLibSharp 2.3.0.0; z440.atl.core 7.19; Matroska 0.0.12; LibSE (Subtitle Edit core) 5.3.0 and SubtitlesParser 1.5.1 for the subtitle rows.
Native tools (information): ffmpeg version 7.0.2-static https://johnvansickle.com/ffmpeg/ Copyrig; MP4Box - GPAC version 26.07-rev0-ga07cbfff-master; mkvmerge v103.0 ('The Darkness') 64-bit; MediaInfo MediaInfo Command line,; ExifTool 13.60.
Method: one fresh process per (row, implementation, file); cold first run recorded in the Note column (information only, not gated); warm-up of at least 30 runs and 1.5 s; 3 samples (managed) and 3 runs (tools, once over 1 GiB); median reported.
SDK 10.0.400, built Release, warnings as errors.

Jobs

Every group ran as wq run --class bench --max 20m (exclusive: the queue starts a bench only when no other bench, heavy or GPU job runs). Load average is the one-minute figure before / during (mean, max of 5 s samples) / after.

Group	wq job	Started	Contents	Load average	Elapsed
G1	002704 (bench)	2026-11-02 20:07Z	demux and probe (mp4-demux, mp4-audio, mp4-probe, mkv-demux, mkv-probe)	before 3.34; during mean 3.03, max 3.34 over 31 samples at 5 s; after 2.77	2.5 min
G2	002707 (bench)	2026-11-02 20:30Z	mux, remux, tag write (mp4-mux, mp4-remux, tagw-*, mkv-mux, remux-mem, playable)	before 2.15; during mean 1.56, max 2.15 over 36 samples at 5 s; after 1.26	2.9 min
G3	002710 (bench)	2026-11-02 20:45Z	tag read and the readers without a managed comparator (mp3/xiph/asf/pcm tags, avi, xiph/flv, mpeg, asf demux, repair-index, package-hls)	before 0.99; during mean 1.17, max 1.30 over 50 samples at 5 s; after 1.25	4.1 min
G4	002713 (bench)	-	subtitle parse and convert (subsbench -n 30 20000 100000)	before: `14:45:17 up 11 days, 1:31, 30 users, load average: 2.83, 1.60, 2.65`; after: `14:58:59 up 11 days, 1:45, 30 users, load average: 1.00, 1.50, 2.43`	-
G5	002744 (bench)	2026-11-02 22:27Z	tag write re-run after the Matroska planning change (tagw-id3, tagw-flac, tagw-ilst, tagw-riff, tagw-mkv; the tagw-* tables and bar lines below are from this run)	before 1.37; during mean 1.25, max 1.37 over 14 samples at 5 s; after 1.18	~2 min

Against the bar

Row	Files with a ratio	Geomean	Worst	Verdict
mp4-demux	4/5	0.10×	0.23×	at the bar
mp4-audio	3/5	0.47×	0.72×	at the bar
mp4-probe	5/5	0.11×	0.42×	at the bar
mkv-demux	6/6	0.26×	0.38×	at the bar
mkv-probe	6/6	0.71×	0.88×	at the bar
mp4-mux	3/3	0.15×	0.35×	at the bar
mp4-remux	3/3	0.12×	0.20×	at the bar
tagw-id3	4/4	0.33×	0.37×	at the bar
tagw-flac	3/3	0.33×	0.39×	at the bar
tagw-ilst	2/2	0.50×	0.57×	at the bar
tagw-riff	3/3	0.58×	0.66×	at the bar
tagw-mkv	1/2	0.90×	0.90×	at the bar
remux-mem	0/2	-	-	no managed comparator, so the row passes (times are information)
playable	0/1	-	-	no managed comparator, so the row passes (times are information)
mkv-mux	0/5	-	-	no managed comparator, so the row passes (times are information)
mp3-tags	7/7	0.50×	0.63×	at the bar
xiph-tags	8/8	0.56×	0.78×	at the bar
xiph-demux	0/7	-	-	no managed comparator, so the row passes (times are information)
asf-tags	6/6	0.56×	0.65×	at the bar
pcm-tags	8/8	0.51×	0.74×	at the bar
avi-demux	0/5	-	-	no managed comparator, so the row passes (times are information)
mpeg-demux	0/7	-	-	no managed comparator, so the row passes (times are information)
asf-demux	0/4	-	-	no managed comparator, so the row passes (times are information)
repair-index	0/6	-	-	no managed comparator, so the row passes (times are information)
package-hls	0/3	-	-	no managed comparator, so the row passes (times are information)
avi-probe	5/5	0.52×	0.67×	at the bar
subs-parse	8/8	0.53×	1.16×	at the bar
subs-convert	6/6	0.40×	1.14×	at the bar

Overall geometric mean of every per-file ratio above (rows with a managed comparator): 0.386× over 91 ratios; worst single ratio 1.16× (parse srt 100000).

Subtitle rows (SubtitlesParser 1.5.1 and Subtitle Edit core 5.3.0 as comparators; median of 30 samples)

Cues	Row	OneMedia median ms (min)	KiB/run	Fastest managed comparator	Its median ms (min)	KiB/run	Ratio
20000	parse srt	4.10 (3.81)	10754	SubtitleEdit core	6.91 (3.21)	13558	0.59×
20000	parse vtt	3.63 (3.49)	11327	SubtitleEdit core	32.07 (15.73)	35599	0.11×
20000	parse ass	9.78 (4.83)	12372	SubtitleEdit core	13.16 (6.24)	19780	0.74×
20000	parse ttml	45.78 (27.28)	43599	SubtitleEdit core	66.52 (59.99)	75772	0.69×
20000	convert srt->vtt	10.66 (6.59)	20119	SubtitleEdit core	24.84 (18.21)	36381	0.43×
20000	convert srt->ass	9.28 (8.87)	22345	SubtitleEdit core	9.78 (9.35)	23809	0.95×
20000	convert srt->ttml	21.39 (16.12)	27531	SubtitleEdit core	138.04 (126.50)	302579	0.15×
100000	parse srt	34.22 (19.43)	53812	SubtitleEdit core	29.40 (15.55)	67891	1.16×
100000	parse vtt	38.76 (18.45)	56580	SubtitleEdit core	176.02 (153.52)	177532	0.22×
100000	parse ass	57.16 (24.29)	61388	SubtitleEdit core	49.70 (37.86)	98678	1.15×
100000	parse ttml	299.11 (195.37)	215980	SubtitleEdit core	493.00 (455.53)	377550	0.61×
100000	convert srt->vtt	57.70 (41.12)	100587	SubtitleEdit core	172.17 (153.97)	181957	0.34×
100000	convert srt->ass	66.28 (52.86)	108828	SubtitleEdit core	58.39 (52.27)	119280	1.14×
100000	convert srt->ttml	119.99 (107.62)	137574	SubtitleEdit core	700.83 (661.92)	1513184	0.17×

Not every comparator reads every format: SubtitlesParser has no TTML reader and parses only a quarter of the ASS file at 100,000 cues (23,411 cues), so the faster Subtitle Edit core is the comparator there.

Tables

Each table is one row of the speed matrix. Columns: median time, ratio against the fastest managed comparator, bytes allocated per run and per packet (the whole open-and-read, not the pull loop alone: see the allocation gate in 0.8-allocations-memory-io.md), packet count, payload read, peak and baseline resident memory of the process, and the cold first run in the Note column.

mp4-demux: MP4/MOV: read every packet of every track

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	33.7 µs	0.02×	23.6 KiB	78.3 B	309	0.2	-	91.1	30.4	cold first run 25.35 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	1.47 ms	1.00×	1.4 MiB	4631.4 B	309	0.2	-	104.5	30.3	cold first run 47.18 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	3.13 ms	0.13×	57.7 KiB	3.2 B	18671	26.5	-	66.7	30.4	cold first run 29.89 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	23.19 ms	1.00×	42.5 MiB	2389.5 B	18671	26.5	-	104.4	30.3	cold first run 108.52 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	43.76 ms	0.13×	2.1 MiB	52.7 B	42276	691.1	-	45.7	30.3	cold first run 75.58 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	SharpMP4	329.31 ms	1.00×	801.0 MiB	19866.2 B	42276	691.1	-	110.6	30.4	cold first run 670.76 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	46.92 ms	-	2.1 MiB	51.7 B	42276	691.1	-	43.7	30.4	cold first run 83.93 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	fail	-	-	-	-	-	-	105.8	30.4	IndexOutOfRangeException: Index was outside the bounds of the array.
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia	296.91 ms	0.23×	1.9 MiB	30.6 B	64576	4172.2	-	39.5	30.4	cold first run 334.71 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	SharpMP4	1.28 s	1.00×	4334.3 MiB	70379.2 B	64576	4172.2	-	109.9	30.3	cold first run 1.46 s

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/big_buck_bunny_1080p_h264.mov	ffmpeg -c copy -f null	159.20 ms	155.12 ms – 177.06 ms	24.7
generated/bench/frag-bbb-1080p.mp4	ffmpeg -c copy -f null	184.01 ms	180.63 ms – 196.26 ms	38.4
generated/large/over4gb-moov-at-end.mp4	ffmpeg -c copy -f null	542.16 ms	542.16 ms – 542.16 ms	25.9
generated/mp4/h264-aac.mp4	ffmpeg -c copy -f null	6.28 ms	6.03 ms – 7.39 ms	17.5
samples/MPEG-4/video.mp4	ffmpeg -c copy -f null	44.89 ms	44.18 ms – 48.54 ms	15.0

mp4-audio: MP4/MOV: read the audio track's packets

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	28.6 µs	0.72×	23.6 KiB	128.0 B	189	0.0	-	91.1	30.4	cold first run 24.44 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneAudio Mp4PacketSource	39.8 µs	1.00×	71.6 KiB	388.2 B	189	0.0	-	91.6	30.4	cold first run 8.10 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia, length asked of the file each time	32.7 µs	0.82×	23.7 KiB	128.6 B	189	0.0	-	91.1	30.5	cold first run 23.22 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	383.6 µs	0.59×	57.7 KiB	8.2 B	7200	1.9	-	90.3	30.4	cold first run 25.11 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneAudio Mp4PacketSource	655.0 µs	1.00×	97.6 KiB	13.9 B	7200	1.9	-	87.3	30.3	cold first run 10.24 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia, length asked of the file each time	408.8 µs	0.62×	57.8 KiB	8.2 B	7200	1.9	-	90.9	30.4	cold first run 23.88 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	3.67 ms	-	62.5 KiB	2.3 B	27960	31.1	-	62.8	30.4	cold first run 33.42 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneAudio Mp4PacketSource	fail	-	-	-	-	-	-	34.4	30.4	UnsupportedAudioFormatException: Audio track 0 uses a QuickTime sound description version this library does not read.
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia, length asked of the file each time	3.77 ms	-	62.6 KiB	2.3 B	27960	31.1	-	62.7	30.4	cold first run 32.21 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	4.24 ms	-	21.7 KiB	0.8 B	27960	31.1	-	48.1	30.4	cold first run 38.44 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneAudio Mp4PacketSource	fail	-	-	-	-	-	-	34.4	30.4	UnsupportedAudioFormatException: Fragmented MP4 files (mvex boxes) are not supported.
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia, length asked of the file each time	4.66 ms	-	21.8 KiB	0.8 B	27960	31.1	-	47.0	30.4	cold first run 40.91 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia	33.48 ms	0.24×	46.9 KiB	1.2 B	39376	9.7	-	37.2	30.4	cold first run 64.33 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneAudio Mp4PacketSource	138.74 ms	1.00×	1020.5 KiB	26.5 B	39376	9.7	-	36.5	30.4	cold first run 150.81 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia, length asked of the file each time	33.49 ms	0.24×	47.0 KiB	1.2 B	39376	9.7	-	37.1	30.4	cold first run 63.69 ms

mp4-probe: MP4/MOV: open, track list, duration, tags

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	12.2 µs	0.19×	23.6 KiB	-	-	-	2	93.1	30.3	cold first run 23.21 ms
generated/mp4/h264-aac.mp4	0.2 MiB	ATL.NET	117.1 µs	1.80×	146.6 KiB	-	-	-	0	93.9	30.5	cold first run 35.48 ms
generated/mp4/h264-aac.mp4	0.2 MiB	MetadataExtractor	81.8 µs	1.26×	77.7 KiB	-	-	-	48	89.5	30.4	cold first run 10.82 ms
generated/mp4/h264-aac.mp4	0.2 MiB	TagLib#	65.0 µs	1.00×	36.7 KiB	-	-	-	2	85.8	30.4	fastest comparator; cold first run 9.98 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	17.7 µs	0.13×	57.7 KiB	-	-	-	6	94.1	30.4	cold first run 19.81 ms
samples/MPEG-4/video.mp4	26.6 MiB	ATL.NET	566.2 µs	4.27×	151.7 KiB	-	-	-	0	92.9	30.4	cold first run 40.11 ms
samples/MPEG-4/video.mp4	26.6 MiB	MetadataExtractor	155.8 µs	1.17×	91.8 KiB	-	-	-	96	87.5	30.5	cold first run 10.53 ms
samples/MPEG-4/video.mp4	26.6 MiB	TagLib#	132.7 µs	1.00×	78.1 KiB	-	-	-	2	85.5	30.4	fastest comparator; cold first run 11.94 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	39.0 µs	0.25×	62.4 KiB	-	-	-	3	97.0	30.3	cold first run 22.98 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	ATL.NET	774.1 µs	5.03×	229.2 KiB	-	-	-	0	92.7	30.4	cold first run 43.56 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	MetadataExtractor	154.0 µs	1.00×	87.7 KiB	-	-	-	61	87.8	30.3	fastest comparator; cold first run 13.25 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	TagLib#	fail	-	-	-	-	-	-	34.3	30.4	UnsupportedFormatException: blender/big_buck_bunny_1080p_h264.mov (taglib/mov)
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	10.1 µs	0.01×	20.9 KiB	-	-	-	3	89.8	30.5	cold first run 19.53 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	ATL.NET	6.11 ms	3.58×	483.7 KiB	-	-	-	0	97.0	30.4	cold first run 53.18 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	MetadataExtractor	4.44 ms	2.60×	183.6 KiB	-	-	-	60	86.4	30.4	cold first run 15.22 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	TagLib#	1.71 ms	1.00×	521.2 KiB	-	-	-	2	91.2	30.3	fastest comparator; cold first run 12.82 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia	29.5 µs	0.42×	46.4 KiB	-	-	-	2	96.5	30.5	cold first run 22.33 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	ATL.NET	1.03 ms	14.69×	146.5 KiB	-	-	-	0	93.5	30.3	cold first run 40.25 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	MetadataExtractor	91.4 µs	1.31×	77.6 KiB	-	-	-	48	87.3	30.5	cold first run 11.43 ms
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	TagLib#	70.1 µs	1.00×	36.0 KiB	-	-	-	2	86.1	30.4	fastest comparator; cold first run 10.18 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/big_buck_bunny_1080p_h264.mov	ExifTool	67.39 ms	67.17 ms – 69.18 ms	22.8
blender/big_buck_bunny_1080p_h264.mov	MP4Box -info	35.53 ms	32.37 ms – 35.66 ms	51.1
blender/big_buck_bunny_1080p_h264.mov	MediaInfo	20.23 ms	19.80 ms – 21.60 ms	14.3
blender/big_buck_bunny_1080p_h264.mov	ffprobe -show_format -show_streams	10.35 ms	8.63 ms – 10.74 ms	23.5
generated/bench/frag-bbb-1080p.mp4	ExifTool	136.75 ms	136.59 ms – 139.29 ms	22.9
generated/bench/frag-bbb-1080p.mp4	MP4Box -info	38.71 ms	37.75 ms – 40.96 ms	52.9
generated/bench/frag-bbb-1080p.mp4	MediaInfo	26.70 ms	25.66 ms – 26.70 ms	14.0
generated/bench/frag-bbb-1080p.mp4	ffprobe -show_format -show_streams	43.98 ms	39.98 ms – 44.64 ms	37.2
generated/large/over4gb-moov-at-end.mp4	ExifTool	66.41 ms	66.41 ms – 66.41 ms	26.7
generated/large/over4gb-moov-at-end.mp4	MP4Box -info	37.45 ms	37.45 ms – 37.45 ms	50.8
generated/large/over4gb-moov-at-end.mp4	MediaInfo	22.49 ms	22.49 ms – 22.49 ms	18.0
generated/large/over4gb-moov-at-end.mp4	ffprobe -show_format -show_streams	18.42 ms	18.42 ms – 18.42 ms	21.0
generated/mp4/h264-aac.mp4	ExifTool	63.41 ms	60.36 ms – 64.78 ms	21.9
generated/mp4/h264-aac.mp4	MP4Box -info	33.76 ms	33.13 ms – 37.08 ms	50.1
generated/mp4/h264-aac.mp4	MediaInfo	9.45 ms	9.22 ms – 9.66 ms	11.3
generated/mp4/h264-aac.mp4	ffprobe -show_format -show_streams	5.80 ms	5.24 ms – 6.91 ms	16.3
samples/MPEG-4/video.mp4	ExifTool	100.99 ms	96.71 ms – 105.81 ms	33.1
samples/MPEG-4/video.mp4	MP4Box -info	34.79 ms	33.17 ms – 36.72 ms	50.1
samples/MPEG-4/video.mp4	MediaInfo	10.85 ms	10.16 ms – 10.89 ms	11.2
samples/MPEG-4/video.mp4	ffprobe -show_format -show_streams	4.84 ms	4.82 ms – 4.99 ms	13.8

mkv-demux: Matroska/WebM: read every packet

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia	83.6 µs	0.19×	1.0 MiB	3513.5 B	309	0.2	-	47.1	30.4	cold first run 27.14 ms
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia, length asked of the file each time	258.3 µs	0.58×	1.0 MiB	3513.8 B	309	0.2	-	47.4	30.4	cold first run 25.72 ms
generated/mkv/h264-aac.mkv	0.2 MiB	StefH Matroska	443.8 µs	1.00×	671.5 KiB	2225.3 B	309	0.2	-	90.5	30.4	cold first run 17.97 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	2.00 ms	0.27×	1.0 MiB	189.4 B	5735	22.2	-	47.6	30.5	cold first run 31.94 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia, length asked of the file each time	3.21 ms	0.43×	1.0 MiB	189.4 B	5735	22.2	-	48.0	30.4	cold first run 33.65 ms
matroska-test-files/test1.mkv	22.3 MiB	StefH Matroska	7.47 ms	1.00×	46.0 MiB	18696.7 B	2582	22.2	-	111.5	30.5	packet count differs from OneMedia's 5735; cold first run 44.15 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	2.42 ms	0.22×	1.0 MiB	254.5 B	4298	30.3	-	47.7	30.4	cold first run 29.88 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia, length asked of the file each time	3.25 ms	0.30×	1.0 MiB	254.5 B	4298	30.3	-	47.2	30.3	cold first run 31.26 ms
matroska-test-files/test5.mkv	30.3 MiB	StefH Matroska	10.83 ms	1.00×	61.6 MiB	41194.4 B	1568	30.3	-	159.4	30.4	packet count differs from OneMedia's 4298; cold first run 48.06 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	106.01 ms	0.28×	1.0 MiB	22.2 B	49323	1125.2	-	39.6	30.4	cold first run 130.54 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia, length asked of the file each time	125.31 ms	0.33×	1.0 MiB	22.2 B	49323	1125.2	-	40.5	30.4	cold first run 144.32 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	StefH Matroska	377.15 ms	1.00×	2265.5 MiB	93604.1 B	25379	1125.2	-	1514.4	30.5	packet count differs from OneMedia's 49323; cold first run 786.73 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	45.83 ms	0.24×	1.0 MiB	13.7 B	80000	544.6	-	44.3	30.4	cold first run 94.16 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia, length asked of the file each time	57.33 ms	0.29×	1.0 MiB	13.7 B	80000	544.6	-	43.8	30.5	cold first run 110.37 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	StefH Matroska	194.74 ms	1.00×	1097.5 MiB	44893.5 B	25634	544.7	-	1214.6	30.4	packet count differs from OneMedia's 80000; cold first run 454.83 ms
generated/large/over4gb.mkv	4.14 GiB	OneMedia	424.99 ms	0.38×	1.0 MiB	16.8 B	64596	4239.4	-	42.2	30.4	cold first run 504.24 ms
generated/large/over4gb.mkv	4.14 GiB	OneMedia, length asked of the file each time	457.41 ms	0.40×	1.0 MiB	16.8 B	64596	4239.4	-	42.4	30.4	cold first run 523.17 ms
generated/large/over4gb.mkv	4.14 GiB	StefH Matroska	1.13 s	1.00×	8516.7 MiB	138250.8 B	64596	4239.4	-	6394.7	30.3	cold first run 2.81 s

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/Sintel.2010.1080p.mkv	ffmpeg -c copy -f null	255.54 ms	255.54 ms – 255.54 ms	20.4
blender/Sintel.2010.1080p.mkv	mkvextract tracks (first track)	248.30 ms	248.30 ms – 248.30 ms	24.1
blender/tears_of_steel_1080p.webm	ffmpeg -c copy -f null	213.02 ms	206.75 ms – 243.05 ms	13.9
blender/tears_of_steel_1080p.webm	mkvextract tracks (first track)	104.88 ms	104.76 ms – 107.03 ms	23.7
generated/large/over4gb.mkv	ffmpeg -c copy -f null	677.64 ms	677.64 ms – 677.64 ms	24.6
generated/large/over4gb.mkv	mkvextract tracks (first track)	1.42 s	1.42 s – 1.42 s	26.7
generated/mkv/h264-aac.mkv	ffmpeg -c copy -f null	5.81 ms	5.50 ms – 6.53 ms	17.4
generated/mkv/h264-aac.mkv	mkvextract tracks (first track)	21.25 ms	21.00 ms – 22.84 ms	17.4
matroska-test-files/test1.mkv	ffmpeg -c copy -f null	21.74 ms	21.64 ms – 23.17 ms	14.2
matroska-test-files/test1.mkv	mkvextract tracks (first track)	28.99 ms	27.99 ms – 29.19 ms	20.8
matroska-test-files/test5.mkv	ffmpeg -c copy -f null	39.54 ms	36.09 ms – 40.33 ms	23.2
matroska-test-files/test5.mkv	mkvextract tracks (first track)	28.36 ms	28.27 ms – 29.60 ms	23.7

mkv-probe: Matroska/WebM: open, track list, duration

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia	8.5 µs	0.70×	36.1 KiB	-	-	-	2	97.0	30.4	cold first run 16.04 ms
generated/mkv/h264-aac.mkv	0.2 MiB	NEbml element reader	12.2 µs	1.00×	68.7 KiB	-	-	-	2	88.1	30.4	cold first run 3.25 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	8.0 µs	0.66×	36.6 KiB	-	-	-	2	96.9	30.4	cold first run 16.48 ms
matroska-test-files/test1.mkv	22.3 MiB	NEbml element reader	12.1 µs	1.00×	68.3 KiB	-	-	-	2	92.2	30.4	cold first run 2.92 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	11.6 µs	0.69×	44.2 KiB	-	-	-	11	100.5	30.4	cold first run 17.37 ms
matroska-test-files/test5.mkv	30.3 MiB	NEbml element reader	16.8 µs	1.00×	72.8 KiB	-	-	-	11	88.2	30.4	cold first run 2.76 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	11.3 µs	0.68×	44.9 KiB	-	-	-	12	97.3	30.5	cold first run 18.00 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	NEbml element reader	16.6 µs	1.00×	73.3 KiB	-	-	-	12	87.9	30.4	cold first run 2.81 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	10.3 µs	0.88×	43.9 KiB	-	-	-	2	96.8	30.4	cold first run 17.98 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	NEbml element reader	11.7 µs	1.00×	68.2 KiB	-	-	-	2	88.4	30.4	cold first run 2.79 ms
generated/large/over4gb.mkv	4.14 GiB	OneMedia	8.0 µs	0.69×	36.1 KiB	-	-	-	2	96.9	30.4	cold first run 16.22 ms
generated/large/over4gb.mkv	4.14 GiB	NEbml element reader	11.6 µs	1.00×	68.6 KiB	-	-	-	2	88.3	30.4	cold first run 3.20 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/Sintel.2010.1080p.mkv	ExifTool	51.29 ms	51.29 ms – 51.29 ms	18.4
blender/Sintel.2010.1080p.mkv	MediaInfo	99.90 ms	99.90 ms – 99.90 ms	10.9
blender/Sintel.2010.1080p.mkv	ffprobe -show_format -show_streams	8.12 ms	8.12 ms – 8.12 ms	19.1
blender/Sintel.2010.1080p.mkv	mkvinfo	19.78 ms	19.78 ms – 19.78 ms	16.5
blender/Sintel.2010.1080p.mkv	mkvmerge -J	30.94 ms	30.94 ms – 30.94 ms	21.8
blender/tears_of_steel_1080p.webm	ExifTool	48.08 ms	47.22 ms – 50.55 ms	18.5
blender/tears_of_steel_1080p.webm	MediaInfo	20.08 ms	18.42 ms – 21.03 ms	11.3
blender/tears_of_steel_1080p.webm	ffprobe -show_format -show_streams	3.88 ms	3.59 ms – 4.24 ms	12.3
blender/tears_of_steel_1080p.webm	mkvinfo	20.50 ms	19.65 ms – 21.34 ms	16.5
blender/tears_of_steel_1080p.webm	mkvmerge -J	28.71 ms	27.40 ms – 29.83 ms	21.2
generated/large/over4gb.mkv	ExifTool	52.72 ms	52.72 ms – 52.72 ms	18.1
generated/large/over4gb.mkv	MediaInfo	133.95 ms	133.95 ms – 133.95 ms	11.3
generated/large/over4gb.mkv	ffprobe -show_format -show_streams	64.48 ms	64.48 ms – 64.48 ms	24.0
generated/large/over4gb.mkv	mkvinfo	23.14 ms	23.14 ms – 23.14 ms	21.0
generated/large/over4gb.mkv	mkvmerge -J	52.08 ms	52.08 ms – 52.08 ms	34.5
generated/mkv/h264-aac.mkv	ExifTool	50.18 ms	48.82 ms – 51.79 ms	18.3
generated/mkv/h264-aac.mkv	MediaInfo	9.27 ms	9.10 ms – 9.77 ms	10.5
generated/mkv/h264-aac.mkv	ffprobe -show_format -show_streams	5.98 ms	4.98 ms – 6.68 ms	16.2
generated/mkv/h264-aac.mkv	mkvinfo	19.63 ms	19.50 ms – 20.22 ms	16.1
generated/mkv/h264-aac.mkv	mkvmerge -J	21.81 ms	21.22 ms – 23.35 ms	19.8
matroska-test-files/test1.mkv	ExifTool	51.27 ms	49.52 ms – 52.17 ms	18.4
matroska-test-files/test1.mkv	MediaInfo	9.89 ms	9.86 ms – 9.99 ms	11.1
matroska-test-files/test1.mkv	ffprobe -show_format -show_streams	3.69 ms	3.64 ms – 3.90 ms	12.7
matroska-test-files/test1.mkv	mkvinfo	20.72 ms	20.57 ms – 21.50 ms	16.5
matroska-test-files/test1.mkv	mkvmerge -J	27.62 ms	26.75 ms – 46.64 ms	22.3
matroska-test-files/test5.mkv	ExifTool	85.04 ms	80.98 ms – 85.65 ms	30.3
matroska-test-files/test5.mkv	MediaInfo	19.27 ms	18.98 ms – 19.82 ms	11.3
matroska-test-files/test5.mkv	ffprobe -show_format -show_streams	21.74 ms	20.50 ms – 22.81 ms	22.2
matroska-test-files/test5.mkv	mkvinfo	20.43 ms	20.03 ms – 22.11 ms	17.7
matroska-test-files/test5.mkv	mkvmerge -J	28.99 ms	27.92 ms – 30.85 ms	25.1

mp4-mux: MP4: write the first AAC track's frames from memory to an MP4 in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	41.5 µs	0.07×	1.0 MiB	5639.5 B	189	0.0	-	49.1	30.5	cold first run 43.86 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia, movie box last	41.2 µs	0.07×	1.0 MiB	5610.2 B	189	0.0	-	48.8	30.4	cold first run 39.42 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	616.4 µs	1.00×	1.5 MiB	8079.4 B	189	0.0	-	43.5	30.4	cold first run 42.93 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	822.9 µs	0.13×	3.0 MiB	439.3 B	7200	2.0	-	84.0	30.3	cold first run 46.73 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia, movie box last	1.03 ms	0.16×	3.0 MiB	438.5 B	7200	2.0	-	69.1	30.5	cold first run 44.96 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	6.32 ms	1.00×	17.5 MiB	2550.9 B	7200	2.0	-	93.3	30.4	cold first run 67.41 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	22.69 ms	0.35×	63.0 MiB	2363.3 B	27960	31.2	-	335.8	30.5	cold first run 120.52 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia, movie box last	15.66 ms	0.24×	63.0 MiB	2363.1 B	27960	31.2	-	367.8	30.4	cold first run 105.54 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	64.04 ms	1.00×	103.7 MiB	3889.9 B	27960	31.3	-	424.8	30.4	cold first run 193.28 ms

mp4-remux: MP4: read the first AAC track from a file and write it as an MP4 in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	138.6 µs	0.10×	1.1 MiB	6375.4 B	189	0.0	-	54.6	30.4	cold first run 61.23 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	1.45 ms	1.00×	2.6 MiB	14536.6 B	189	0.0	-	62.6	30.5	cold first run 81.57 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	1.57 ms	0.09×	3.2 MiB	464.9 B	7200	2.0	-	81.2	30.4	cold first run 66.38 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	17.39 ms	1.00×	34.7 MiB	5052.3 B	7200	2.0	-	109.5	30.4	cold first run 135.94 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	26.81 ms	0.20×	63.2 MiB	2368.4 B	27960	31.2	-	195.4	30.4	cold first run 132.49 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	133.55 ms	1.00×	243.3 MiB	9123.1 B	27960	31.3	-	404.0	30.4	cold first run 387.94 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/bench/frag-bbb-1080p.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	131.16 ms	102.42 ms – 150.54 ms	52.1
generated/mp4/h264-aac.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	6.72 ms	5.88 ms – 7.49 ms	17.5
samples/MPEG-4/video.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	32.29 ms	32.03 ms – 34.74 ms	17.5

tagw-id3: MP3: change title, artist, album and comment; the edited file in memory

File	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/audio-es/tagged/id3v24-basic.mp3	OneMedia	7.7 µs	0.33×	77.7 KiB	79536.0 B	1	-	-	96.3	30.4	cold first run 32.75 ms
generated/audio-es/tagged/id3v24-basic.mp3	ATL.NET	239.8 µs	10.33×	938.2 KiB	960726.1 B	1	-	-	99.9	30.2	cold first run 53.06 ms
generated/audio-es/tagged/id3v24-basic.mp3	TagLib#	23.2 µs	1.00×	140.5 KiB	143834.0 B	1	-	-	95.3	30.3	fastest comparator; cold first run 21.98 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	OneMedia	8.3 µs	0.37×	79.2 KiB	81136.0 B	1	-	-	97.4	30.4	cold first run 29.58 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	ATL.NET	220.6 µs	9.76×	1.0 MiB	1073598.0 B	1	-	-	99.9	30.3	cold first run 63.47 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	TagLib#	22.6 µs	1.00×	137.9 KiB	141200.0 B	1	-	-	95.4	30.2	fastest comparator; cold first run 18.42 ms
generated/audio-es/tagged/id3v22-basic.mp3	OneMedia	8.7 µs	0.32×	80.1 KiB	82064.0 B	1	-	-	96.4	30.3	cold first run 30.34 ms
generated/audio-es/tagged/id3v22-basic.mp3	ATL.NET	238.4 µs	8.75×	935.8 KiB	958301.2 B	1	-	-	99.5	30.3	cold first run 56.08 ms
generated/audio-es/tagged/id3v22-basic.mp3	TagLib#	27.3 µs	1.00×	138.2 KiB	141554.0 B	1	-	-	95.7	30.4	fastest comparator; cold first run 23.04 ms
generated/audio-es/tagged/apev2-only.mp3	OneMedia	5.4 µs	0.30×	67.5 KiB	69096.0 B	1	-	-	96.9	30.3	cold first run 32.40 ms
generated/audio-es/tagged/apev2-only.mp3	ATL.NET	339.0 µs	18.66×	1.0 MiB	1083778.9 B	1	-	-	94.3	30.3	cold first run 55.81 ms
generated/audio-es/tagged/apev2-only.mp3	TagLib#	18.2 µs	1.00×	116.8 KiB	119626.0 B	1	-	-	95.2	30.3	fastest comparator; cold first run 21.27 ms

tagw-flac: FLAC: change title, artist, album and comment; the edited file in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/xiph-flv/flac/tags.flac	0.1 MiB	OneMedia	5.2 µs	0.39×	70.3 KiB	71944.0 B	1	-	-	92.5	30.2	cold first run 21.38 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	ATL.NET	132.4 µs	10.08×	783.3 KiB	802140.7 B	1	-	-	100.1	30.3	cold first run 48.47 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	TagLib#	13.1 µs	1.00×	144.1 KiB	147592.0 B	1	-	-	100.5	30.4	fastest comparator; cold first run 11.23 ms
generated/xiph-flv/tagvar/flac-cover-tags.flac	0.1 MiB	OneMedia	4.7 µs	0.27×	75.3 KiB	77064.0 B	1	-	-	92.0	30.3	cold first run 22.58 ms
generated/xiph-flv/tagvar/flac-cover-tags.flac	0.1 MiB	ATL.NET	257.0 µs	14.84×	940.0 KiB	962589.3 B	1	-	-	97.0	30.3	cold first run 49.93 ms
generated/xiph-flv/tagvar/flac-cover-tags.flac	0.1 MiB	TagLib#	17.3 µs	1.00×	239.9 KiB	245705.8 B	1	-	-	97.4	30.2	fastest comparator; cold first run 12.49 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	OneMedia	5.7 µs	0.33×	72.9 KiB	74664.0 B	1	-	-	92.0	30.3	cold first run 21.41 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	ATL.NET	151.5 µs	8.77×	813.9 KiB	833468.5 B	1	-	-	100.0	30.3	cold first run 49.85 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	TagLib#	17.3 µs	1.00×	151.0 KiB	154583.9 B	1	-	-	96.8	30.2	fastest comparator; cold first run 11.57 ms

tagw-ilst: MP4/M4A: change title, artist, album and comment in `ilst`; the edited file in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac-tags.mp4	0.2 MiB	OneMedia	82.8 µs	0.57×	366.2 KiB	375032.0 B	1	-	-	46.7	30.3	cold first run 27.17 ms
generated/mp4/h264-aac-tags.mp4	0.2 MiB	ATL.NET	1.73 ms	12.01×	1.9 MiB	2027337.1 B	1	-	-	78.3	30.3	cold first run 66.01 ms
generated/mp4/h264-aac-tags.mp4	0.2 MiB	TagLib#	144.2 µs	1.00×	413.9 KiB	423794.1 B	1	-	-	46.8	30.4	fastest comparator; cold first run 15.10 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	OneMedia	8.8 µs	0.44×	137.7 KiB	141016.0 B	1	-	-	94.8	30.3	cold first run 25.63 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	ATL.NET	200.0 µs	10.07×	1.1 MiB	1102430.1 B	1	-	-	98.4	30.3	cold first run 64.24 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	TagLib#	19.9 µs	1.00×	142.3 KiB	145761.8 B	1	-	-	96.2	30.2	fastest comparator; cold first run 13.68 ms

tagw-riff: WAV: change `LIST INFO` title, artist, album and comment; the edited file in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/pcm/tagged-wav-info.wav	0.5 MiB	OneMedia	178.5 µs	0.66×	533.1 KiB	545856.0 B	1	-	-	47.0	30.3	cold first run 25.59 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	ATL.NET	345.6 µs	1.27×	1.1 MiB	1181621.2 B	1	-	-	47.9	30.3	cold first run 50.29 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	TagLib#	271.7 µs	1.00×	582.8 KiB	596765.8 B	1	-	-	41.4	30.2	fastest comparator; cold first run 21.80 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	OneMedia	70.2 µs	0.44×	863.6 KiB	884321.0 B	1	-	-	62.8	30.2	cold first run 26.77 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	ATL.NET	653.5 µs	4.12×	1.8 MiB	1902394.9 B	1	-	-	87.8	30.3	cold first run 55.30 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	TagLib#	158.6 µs	1.00×	911.0 KiB	932897.0 B	1	-	-	46.6	30.3	fastest comparator; cold first run 20.90 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	OneMedia	181.1 µs	0.66×	533.1 KiB	545856.0 B	1	-	-	46.8	30.3	cold first run 23.80 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	ATL.NET	344.6 µs	1.25×	1.1 MiB	1181618.9 B	1	-	-	48.9	30.3	cold first run 52.24 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	TagLib#	274.7 µs	1.00×	582.8 KiB	596769.2 B	1	-	-	42.0	30.3	fastest comparator; cold first run 21.87 ms

tagw-mkv: Matroska: change title, artist, album and comment; the edited file in memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-two-audio-tags.mkv	0.2 MiB	OneMedia	111.3 µs	0.90×	306.8 KiB	314192.0 B	1	-	-	51.0	30.3	cold first run 50.19 ms
generated/mkv/h264-two-audio-tags.mkv	0.2 MiB	ATL.NET	fail	-	-	-	-	-	-	38.7	30.3	NullReferenceException: Object reference not set to an instance of an object.
generated/mkv/h264-two-audio-tags.mkv	0.2 MiB	TagLib#	124.3 µs	1.00×	323.1 KiB	330810.9 B	1	-	-	41.9	30.4	cold first run 11.94 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	1.82 ms	-	22.3 MiB	23393024.0 B	1	-	-	210.8	30.3	cold first run 66.85 ms
matroska-test-files/test1.mkv	22.3 MiB	ATL.NET	fail	-	-	-	-	-	-	83.0	30.3	NullReferenceException: Object reference not set to an instance of an object.
matroska-test-files/test1.mkv	22.3 MiB	TagLib#	fail	-	-	-	-	-	-	79.6	30.3	InvalidOperationException: Invalid EBML format Read

remux-mem: Remux of the files past 4 GiB into MP4 and Matroska, output to disk: peak resident memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia to MP4	2.27 s	-	2.9 MiB	46.3 B	64576	4173.2	-	65.9	30.4	cold first run 2.34 s
generated/large/over4gb-moov-at-end.mp4	4.08 GiB	OneMedia to Matroska	1.67 s	-	22.0 MiB	357.9 B	64576	4172.9	-	69.9	30.4	cold first run 1.76 s
generated/large/over4gb.mkv	4.14 GiB	OneMedia to MP4	4.79 s	-	6.4 MiB	104.4 B	64596	4240.6	-	89.1	30.4	cold first run 4.91 s
generated/large/over4gb.mkv	4.14 GiB	OneMedia to Matroska	4.21 s	-	25.4 MiB	412.4 B	64596	4240.1	-	97.5	30.5	cold first run 4.39 s

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB	Note
generated/large/over4gb-moov-at-end.mp4	ffmpeg -c copy -f matroska	2.90 s	2.90 s – 2.90 s	32.2
generated/large/over4gb.mkv	ffmpeg -c copy -f matroska	3.09 s	3.09 s – 3.09 s	31.9

playable: MakePlayable (generic MP4): Matroska H.264+AAC to MP4; information

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia	166.91 ms	-	1.8 MiB	1838312.0 B	1	0.2	-	63.3	30.4	cold first run 301.04 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB	Note
generated/mkv/h264-aac.mkv	ffmpeg -c copy -f mp4	6.70 ms	6.46 ms – 7.44 ms	17.4

mkv-mux: Matroska/WebM: read every packet and write it to a new Matroska file (no managed Matroska writer to compare with)

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia	170.2 µs	-	1.3 MiB	4340.8 B	309	0.2	-	68.5	30.4	cold first run 42.06 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	6.64 ms	-	9.2 MiB	1674.4 B	5735	22.2	-	65.6	30.5	cold first run 52.06 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	4.26 ms	-	5.1 MiB	1232.4 B	4298	30.3	-	75.2	30.5	cold first run 52.06 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	139.66 ms	-	33.2 MiB	705.4 B	49323	1125.2	-	83.2	30.4	cold first run 240.19 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	71.50 ms	-	33.4 MiB	437.3 B	80000	544.6	-	100.8	30.4	cold first run 183.45 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB	Note
blender/Sintel.2010.1080p.mkv	ffmpeg -c copy -f matroska	955.98 ms	955.98 ms – 955.98 ms	48.1
blender/Sintel.2010.1080p.mkv	mkvmerge	384.60 ms	384.60 ms – 384.60 ms	73.5	exit 1
blender/tears_of_steel_1080p.webm	ffmpeg -c copy -f matroska	225.71 ms	221.54 ms – 335.84 ms	20.0
blender/tears_of_steel_1080p.webm	mkvmerge	210.27 ms	201.93 ms – 215.83 ms	46.4	exit 1
generated/mkv/h264-aac.mkv	ffmpeg -c copy -f matroska	7.11 ms	5.94 ms – 7.28 ms	17.4
generated/mkv/h264-aac.mkv	mkvmerge	21.93 ms	21.37 ms – 24.12 ms	20.7	exit 1
matroska-test-files/test1.mkv	ffmpeg -c copy -f matroska	37.27 ms	34.52 ms – 39.02 ms	16.4
matroska-test-files/test1.mkv	mkvmerge	44.68 ms	43.74 ms – 45.96 ms	48.3	exit 1
matroska-test-files/test5.mkv	ffmpeg -c copy -f matroska	55.32 ms	53.90 ms – 63.88 ms	26.0
matroska-test-files/test5.mkv	mkvmerge	57.57 ms	56.81 ms – 62.07 ms	65.9	exit 1

mp3-tags: MP3: open and read the common tags

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/audio-es/tagged/id3v22-basic.mp3	0.0 MiB	OneMedia	24.2 µs	0.46×	35.5 KiB	-	-	-	-	95.7	30.4	cold first run 35.38 ms
generated/audio-es/tagged/id3v22-basic.mp3	0.0 MiB	ATL.NET	70.3 µs	1.34×	285.5 KiB	-	-	-	-	92.8	30.4	cold first run 34.62 ms
generated/audio-es/tagged/id3v22-basic.mp3	0.0 MiB	TagLib#	52.4 µs	1.00×	34.1 KiB	-	-	-	-	86.1	30.4	fastest comparator; cold first run 17.52 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	OneMedia	29.1 µs	0.45×	42.5 KiB	-	-	-	-	95.9	30.4	cold first run 32.68 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	ATL.NET	111.7 µs	1.74×	296.0 KiB	-	-	-	-	92.8	30.3	cold first run 40.45 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	TagLib#	64.2 µs	1.00×	33.0 KiB	-	-	-	-	86.1	30.5	fastest comparator; cold first run 14.96 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	OneMedia	23.5 µs	0.44×	36.0 KiB	-	-	-	-	95.7	30.5	cold first run 31.51 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	ATL.NET	73.8 µs	1.37×	285.5 KiB	-	-	-	-	92.7	30.4	cold first run 37.86 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	TagLib#	53.8 µs	1.00×	37.9 KiB	-	-	-	-	86.4	30.5	fastest comparator; cold first run 15.92 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	OneMedia	18.5 µs	0.46×	25.8 KiB	-	-	-	-	95.9	30.4	cold first run 29.28 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	ATL.NET	48.5 µs	1.21×	274.1 KiB	-	-	-	-	92.3	30.4	cold first run 32.72 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	TagLib#	40.2 µs	1.00×	26.3 KiB	-	-	-	-	85.7	30.5	fastest comparator; cold first run 16.52 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	OneMedia	23.6 µs	0.47×	32.1 KiB	-	-	-	-	95.2	30.4	cold first run 31.90 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	ATL.NET	89.7 µs	1.78×	348.0 KiB	-	-	-	-	93.1	30.5	cold first run 37.45 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	TagLib#	50.5 µs	1.00×	30.6 KiB	-	-	-	-	90.8	30.4	fastest comparator; cold first run 15.23 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	OneMedia	37.0 µs	0.60×	52.2 KiB	-	-	-	-	96.3	30.4	cold first run 33.68 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	ATL.NET	139.7 µs	2.28×	308.8 KiB	-	-	-	-	93.0	30.4	cold first run 43.75 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	TagLib#	61.3 µs	1.00×	46.9 KiB	-	-	-	-	87.0	30.4	fastest comparator; cold first run 15.03 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	OneMedia	14.9 µs	0.63×	20.5 KiB	-	-	-	-	91.2	30.4	cold first run 26.82 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	ATL.NET	45.4 µs	1.92×	334.6 KiB	-	-	-	-	92.3	30.5	cold first run 31.44 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	TagLib#	23.6 µs	1.00×	14.7 KiB	-	-	-	-	85.6	30.4	fastest comparator; cold first run 13.54 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/audio-es/mp3/long-60s.mp3	ExifTool	49.33 ms	48.44 ms – 53.91 ms	18.4
generated/audio-es/mp3/long-60s.mp3	MediaInfo	5.74 ms	5.38 ms – 5.76 ms	9.4
generated/audio-es/mp3/long-60s.mp3	ffprobe -show_format -show_streams	3.46 ms	2.73 ms – 4.56 ms	11.8
generated/audio-es/tagged/apev2-only.mp3	ExifTool	51.62 ms	51.43 ms – 52.05 ms	18.4
generated/audio-es/tagged/apev2-only.mp3	MediaInfo	6.79 ms	6.64 ms – 7.67 ms	13.8
generated/audio-es/tagged/apev2-only.mp3	ffprobe -show_format -show_streams	4.43 ms	2.73 ms – 5.30 ms	11.8
generated/audio-es/tagged/id3v22-basic.mp3	ExifTool	50.78 ms	48.86 ms – 52.43 ms	18.6
generated/audio-es/tagged/id3v22-basic.mp3	MediaInfo	7.68 ms	7.29 ms – 8.00 ms	13.7
generated/audio-es/tagged/id3v22-basic.mp3	ffprobe -show_format -show_streams	5.08 ms	4.60 ms – 6.22 ms	11.9
generated/audio-es/tagged/id3v23-and-v1.mp3	ExifTool	52.44 ms	50.78 ms – 53.27 ms	18.4
generated/audio-es/tagged/id3v23-and-v1.mp3	MediaInfo	5.51 ms	5.10 ms – 6.77 ms	9.4
generated/audio-es/tagged/id3v23-and-v1.mp3	ffprobe -show_format -show_streams	5.43 ms	4.91 ms – 6.84 ms	11.8
generated/audio-es/tagged/id3v24-apev2-v1.mp3	ExifTool	58.26 ms	55.80 ms – 58.52 ms	21.1
generated/audio-es/tagged/id3v24-apev2-v1.mp3	MediaInfo	7.17 ms	6.94 ms – 7.97 ms	13.9
generated/audio-es/tagged/id3v24-apev2-v1.mp3	ffprobe -show_format -show_streams	5.52 ms	5.00 ms – 7.79 ms	11.8
generated/audio-es/tagged/id3v24-basic.mp3	ExifTool	57.84 ms	56.23 ms – 58.99 ms	21.1
generated/audio-es/tagged/id3v24-basic.mp3	MediaInfo	7.34 ms	6.90 ms – 7.37 ms	13.7
generated/audio-es/tagged/id3v24-basic.mp3	ffprobe -show_format -show_streams	5.00 ms	4.92 ms – 6.86 ms	11.9
generated/audio-es/tagged/id3v24-chapters.mp3	ExifTool	51.66 ms	48.79 ms – 52.45 ms	18.4
generated/audio-es/tagged/id3v24-chapters.mp3	MediaInfo	5.61 ms	5.28 ms – 5.84 ms	9.4
generated/audio-es/tagged/id3v24-chapters.mp3	ffprobe -show_format -show_streams	5.18 ms	4.29 ms – 5.27 ms	11.8

xiph-tags: FLAC/Ogg: open, tags, duration

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/xiph-flv/flac/tags.flac	0.1 MiB	OneMedia	15.2 µs	0.72×	9.0 KiB	-	-	-	-	90.5	30.4	cold first run 26.24 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	ATL.NET	38.9 µs	1.86×	89.3 KiB	-	-	-	-	93.7	30.4	cold first run 29.97 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	TagLib#	20.9 µs	1.00×	19.9 KiB	-	-	-	-	85.8	30.4	fastest comparator; cold first run 8.79 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	OneMedia	19.3 µs	0.70×	18.0 KiB	-	-	-	-	94.7	30.5	cold first run 25.67 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	ATL.NET	43.7 µs	1.59×	90.1 KiB	-	-	-	-	92.2	30.3	cold first run 30.46 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	TagLib#	27.4 µs	1.00×	72.8 KiB	-	-	-	-	89.8	30.5	fastest comparator; cold first run 9.61 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	OneMedia	17.8 µs	0.78×	9.4 KiB	-	-	-	-	90.5	30.4	cold first run 23.77 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	ATL.NET	42.6 µs	1.87×	98.8 KiB	-	-	-	-	92.9	30.4	cold first run 31.72 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	TagLib#	22.8 µs	1.00×	23.4 KiB	-	-	-	-	85.7	30.4	fastest comparator; cold first run 8.57 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	OneMedia	18.7 µs	0.38×	22.2 KiB	-	-	-	-	92.8	30.3	cold first run 29.68 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	ATL.NET	54.0 µs	1.10×	168.4 KiB	-	-	-	-	92.5	30.4	cold first run 30.52 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	TagLib#	48.9 µs	1.00×	33.9 KiB	-	-	-	-	86.0	30.4	fastest comparator; cold first run 9.84 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	OneMedia	19.3 µs	0.56×	22.9 KiB	-	-	-	-	93.7	30.5	cold first run 30.68 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	ATL.NET	65.8 µs	1.90×	178.0 KiB	-	-	-	-	92.7	30.4	cold first run 33.14 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	TagLib#	34.7 µs	1.00×	37.5 KiB	-	-	-	-	89.7	30.4	fastest comparator; cold first run 10.27 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	OneMedia	12.5 µs	0.53×	12.2 KiB	-	-	-	-	91.9	30.4	cold first run 28.38 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	ATL.NET	69.5 µs	2.97×	162.0 KiB	-	-	-	-	92.4	30.4	cold first run 31.95 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	TagLib#	23.4 µs	1.00×	23.8 KiB	-	-	-	-	90.1	30.5	fastest comparator; cold first run 10.03 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	OneMedia	10.5 µs	0.37×	7.9 KiB	-	-	-	-	92.0	30.4	cold first run 31.40 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	ATL.NET	54.5 µs	1.94×	151.5 KiB	-	-	-	-	92.5	30.4	cold first run 30.35 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	TagLib#	28.1 µs	1.00×	16.9 KiB	-	-	-	-	86.0	30.4	fastest comparator; cold first run 10.00 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	OneMedia	25.5 µs	0.54×	26.2 KiB	-	-	-	-	96.6	30.4	cold first run 30.64 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	ATL.NET	47.9 µs	1.02×	157.5 KiB	-	-	-	-	92.6	30.4	cold first run 31.16 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	TagLib#	46.9 µs	1.00×	33.5 KiB	-	-	-	-	85.9	30.4	fastest comparator; cold first run 9.52 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/big_buck_bunny_480p_stereo.ogg	ExifTool	51.66 ms	49.32 ms – 52.56 ms	18.6
blender/big_buck_bunny_480p_stereo.ogg	MediaInfo	7.19 ms	6.97 ms – 7.24 ms	10.2
blender/big_buck_bunny_480p_stereo.ogg	ffprobe -show_format -show_streams	6.09 ms	5.03 ms – 6.52 ms	14.8
generated/xiph-flv/flac/cover.flac	ExifTool	48.43 ms	47.09 ms – 50.91 ms	18.8
generated/xiph-flv/flac/cover.flac	MediaInfo	7.54 ms	6.51 ms – 7.62 ms	14.0
generated/xiph-flv/flac/cover.flac	ffprobe -show_format -show_streams	2.87 ms	2.13 ms – 3.71 ms	11.3
generated/xiph-flv/flac/tags.flac	ExifTool	50.18 ms	48.68 ms – 50.96 ms	18.4
generated/xiph-flv/flac/tags.flac	MediaInfo	5.48 ms	5.35 ms – 5.77 ms	9.2
generated/xiph-flv/flac/tags.flac	ffprobe -show_format -show_streams	2.51 ms	2.47 ms – 2.72 ms	11.1
generated/xiph-flv/ogg/opus-tags.opus	ExifTool	48.26 ms	48.13 ms – 52.66 ms	18.4
generated/xiph-flv/ogg/opus-tags.opus	MediaInfo	5.24 ms	5.23 ms – 5.70 ms	9.4
generated/xiph-flv/ogg/opus-tags.opus	ffprobe -show_format -show_streams	2.94 ms	2.74 ms – 3.29 ms	11.8
generated/xiph-flv/ogg/vorbis-tags.ogg	ExifTool	49.73 ms	47.38 ms – 50.05 ms	18.6
generated/xiph-flv/ogg/vorbis-tags.ogg	MediaInfo	5.57 ms	5.56 ms – 5.76 ms	9.5
generated/xiph-flv/ogg/vorbis-tags.ogg	ffprobe -show_format -show_streams	3.20 ms	2.68 ms – 3.47 ms	11.8
generated/xiph-flv/tagvar/flac-rich.flac	ExifTool	49.88 ms	48.50 ms – 52.76 ms	18.5
generated/xiph-flv/tagvar/flac-rich.flac	MediaInfo	5.64 ms	5.40 ms – 5.68 ms	9.1
generated/xiph-flv/tagvar/flac-rich.flac	ffprobe -show_format -show_streams	3.11 ms	2.52 ms – 4.37 ms	11.1
generated/xiph-flv/tagvar/opus-unicode.opus	ExifTool	49.58 ms	47.45 ms – 49.81 ms	18.6
generated/xiph-flv/tagvar/opus-unicode.opus	MediaInfo	5.48 ms	5.40 ms – 5.76 ms	9.4
generated/xiph-flv/tagvar/opus-unicode.opus	ffprobe -show_format -show_streams	2.74 ms	2.66 ms – 2.84 ms	11.8
generated/xiph-flv/tagvar/vorbis-rich.ogg	ExifTool	48.55 ms	47.69 ms – 52.19 ms	18.4
generated/xiph-flv/tagvar/vorbis-rich.ogg	MediaInfo	5.61 ms	5.52 ms – 6.06 ms	9.4
generated/xiph-flv/tagvar/vorbis-rich.ogg	ffprobe -show_format -show_streams	3.86 ms	3.11 ms – 4.67 ms	11.8

xiph-demux: Ogg/FLAC/FLV: read every packet

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/xiph-flv/flac/bs4096.flac	0.5 MiB	OneMedia	897.0 µs	-	65.5 KiB	1426.6 B	47	0.5	-	88.6	30.4	cold first run 18.69 ms
generated/xiph-flv/ogg/opus-stereo-64k.opus	0.0 MiB	OneMedia	89.8 µs	-	21.5 KiB	109.7 B	201	0.0	-	90.8	30.4	cold first run 21.59 ms
generated/xiph-flv/ogg/vorbis-stereo-q5.ogg	0.0 MiB	OneMedia	86.3 µs	-	34.2 KiB	201.1 B	174	0.0	-	91.8	30.3	cold first run 23.08 ms
generated/xiph-flv/ogg/theora-vorbis.ogv	0.2 MiB	OneMedia	476.9 µs	-	42.0 KiB	146.5 B	294	0.2	-	91.9	30.4	cold first run 24.23 ms
generated/xiph-flv/flv/h264-aac.flv	0.2 MiB	OneMedia	44.7 µs	-	16.7 KiB	58.0 B	294	0.2	-	94.6	30.4	cold first run 18.55 ms
generated/xiph-flv/flv/mp3-44k.flv	0.1 MiB	OneMedia	24.2 µs	-	7.1 KiB	46.8 B	155	0.1	-	92.4	30.4	cold first run 14.47 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	OneMedia	292.05 ms	-	731.0 KiB	14.9 B	50290	157.5	-	44.9	30.4	cold first run 381.36 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
blender/big_buck_bunny_480p_stereo.ogg	ffmpeg -c copy -f null	207.64 ms	207.09 ms – 256.87 ms	15.8
generated/xiph-flv/flac/bs4096.flac	ffmpeg -c copy -f null	3.73 ms	3.56 ms – 3.87 ms	12.5
generated/xiph-flv/flv/h264-aac.flv	ffmpeg -c copy -f null	7.09 ms	6.42 ms – 9.76 ms	19.4
generated/xiph-flv/flv/mp3-44k.flv	ffmpeg -c copy -f null	4.45 ms	4.10 ms – 4.79 ms	14.8
generated/xiph-flv/ogg/opus-stereo-64k.opus	ffmpeg -c copy -f null	4.57 ms	3.60 ms – 5.00 ms	12.8
generated/xiph-flv/ogg/theora-vorbis.ogv	ffmpeg -c copy -f null	5.47 ms	5.42 ms – 5.74 ms	14.6
generated/xiph-flv/ogg/vorbis-stereo-q5.ogg	ffmpeg -c copy -f null	3.68 ms	3.24 ms – 3.87 ms	13.1

asf-tags: ASF/WMA/WMV: open and read the tags (title, artist, album, genre, pictures)

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/asf/wmv2-wmav2-tagged.wmv	0.4 MiB	OneMedia	23.3 µs	0.57×	75.3 KiB	-	-	-	-	98.6	30.4	cold first run 34.75 ms
generated/asf/wmv2-wmav2-tagged.wmv	0.4 MiB	ATL.NET	197.9 µs	4.86×	598.1 KiB	-	-	-	-	92.5	30.4	cold first run 35.53 ms
generated/asf/wmv2-wmav2-tagged.wmv	0.4 MiB	TagLib#	40.7 µs	1.00×	27.6 KiB	-	-	-	-	89.5	30.4	fastest comparator; cold first run 8.71 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	OneMedia	23.7 µs	0.62×	66.2 KiB	-	-	-	-	103.8	30.5	cold first run 33.86 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	ATL.NET	125.8 µs	3.27×	444.9 KiB	-	-	-	-	93.3	30.4	cold first run 34.70 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	TagLib#	38.4 µs	1.00×	26.1 KiB	-	-	-	-	89.5	30.4	fastest comparator; cold first run 9.03 ms
generated/asf/wmav2-cover.wma	0.1 MiB	OneMedia	16.5 µs	0.50×	70.5 KiB	-	-	-	-	103.6	30.4	cold first run 37.89 ms
generated/asf/wmav2-cover.wma	0.1 MiB	ATL.NET	96.9 µs	2.92×	424.1 KiB	-	-	-	-	92.9	30.5	cold first run 31.39 ms
generated/asf/wmav2-cover.wma	0.1 MiB	TagLib#	33.2 µs	1.00×	20.3 KiB	-	-	-	-	85.6	30.4	fastest comparator; cold first run 8.87 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	OneMedia	16.9 µs	0.56×	61.6 KiB	-	-	-	-	98.7	30.5	cold first run 37.16 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	ATL.NET	102.6 µs	3.41×	424.9 KiB	-	-	-	-	92.8	30.4	cold first run 31.54 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	TagLib#	30.1 µs	1.00×	18.4 KiB	-	-	-	-	90.0	30.4	fastest comparator; cold first run 8.93 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	OneMedia	32.4 µs	0.46×	82.3 KiB	-	-	-	-	99.4	30.4	cold first run 34.41 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	ATL.NET	272.4 µs	3.86×	713.1 KiB	-	-	-	-	93.5	30.4	cold first run 38.29 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	TagLib#	70.5 µs	1.00×	166.0 KiB	-	-	-	-	90.0	30.4	fastest comparator; cold first run 9.82 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	OneMedia	37.3 µs	0.65×	129.1 KiB	-	-	-	-	104.4	30.4	cold first run 41.25 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	ATL.NET	229.7 µs	4.02×	813.3 KiB	-	-	-	-	93.2	30.4	cold first run 34.16 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	TagLib#	57.2 µs	1.00×	73.3 KiB	-	-	-	-	90.0	30.4	fastest comparator; cold first run 9.06 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/asf/mp3-tagged-unicode.wma	ExifTool	81.71 ms	78.19 ms – 82.04 ms	30.4
generated/asf/mp3-tagged-unicode.wma	MediaInfo	5.76 ms	5.38 ms – 6.10 ms	9.4
generated/asf/mp3-tagged-unicode.wma	ffprobe -show_format -show_streams	3.15 ms	2.64 ms – 4.19 ms	11.8
generated/asf/wmav2-cover.wma	ExifTool	79.06 ms	77.09 ms – 80.47 ms	30.7
generated/asf/wmav2-cover.wma	MediaInfo	9.38 ms	9.35 ms – 9.49 ms	10.9
generated/asf/wmav2-cover.wma	ffprobe -show_format -show_streams	3.66 ms	3.20 ms – 5.99 ms	12.1
generated/asf/wmav2-tagged.wma	ExifTool	82.24 ms	79.54 ms – 86.09 ms	30.6
generated/asf/wmav2-tagged.wma	MediaInfo	5.86 ms	5.77 ms – 5.97 ms	9.2
generated/asf/wmav2-tagged.wma	ffprobe -show_format -show_streams	3.50 ms	2.99 ms – 4.66 ms	11.8
generated/asf/wmv2-wmav2-tagged.wmv	ExifTool	86.79 ms	80.29 ms – 89.02 ms	30.6
generated/asf/wmv2-wmav2-tagged.wmv	MediaInfo	10.00 ms	9.97 ms – 10.01 ms	10.9
generated/asf/wmv2-wmav2-tagged.wmv	ffprobe -show_format -show_streams	4.13 ms	3.38 ms – 5.39 ms	13.2
samples/ASF/wma_with_ID3_APIC.wma	ExifTool	85.15 ms	80.51 ms – 87.74 ms	30.6
samples/ASF/wma_with_ID3_APIC.wma	MediaInfo	5.34 ms	5.24 ms – 5.72 ms	9.1
samples/ASF/wma_with_ID3_APIC.wma	ffprobe -show_format -show_streams	3.30 ms	3.06 ms – 3.54 ms	12.1
samples/ASF/wma_with_WmPicture.wma	ExifTool	84.61 ms	80.86 ms – 86.50 ms	30.7
samples/ASF/wma_with_WmPicture.wma	MediaInfo	7.74 ms	7.74 ms – 7.76 ms	13.7
samples/ASF/wma_with_WmPicture.wma	ffprobe -show_format -show_streams	3.28 ms	3.07 ms – 3.41 ms	12.1

pcm-tags: WAVE/AIFF/CAF: open, duration, tags

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/pcm/tagged-wav-info.wav	0.5 MiB	OneMedia	21.1 µs	0.51×	9.7 KiB	-	-	-	-	96.1	30.3	cold first run 23.52 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	ATL.NET	41.4 µs	1.00×	84.4 KiB	-	-	-	-	92.2	30.4	fastest comparator; cold first run 29.36 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	TagLib#	56.7 µs	1.37×	30.9 KiB	-	-	-	-	90.9	30.4	cold first run 16.56 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	OneMedia	24.7 µs	0.44×	13.7 KiB	-	-	-	-	93.3	30.4	cold first run 27.37 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	ATL.NET	114.0 µs	2.02×	148.9 KiB	-	-	-	-	92.6	30.4	cold first run 31.38 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	TagLib#	56.3 µs	1.00×	31.2 KiB	-	-	-	-	86.9	30.4	fastest comparator; cold first run 17.27 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	OneMedia	20.7 µs	0.56×	9.7 KiB	-	-	-	-	92.2	30.3	cold first run 23.54 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	ATL.NET	37.3 µs	1.00×	84.4 KiB	-	-	-	-	92.2	30.4	fastest comparator; cold first run 30.23 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	TagLib#	55.6 µs	1.49×	30.9 KiB	-	-	-	-	90.9	30.4	cold first run 16.72 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	OneMedia	10.0 µs	0.74×	3.6 KiB	-	-	-	-	91.1	30.4	cold first run 21.23 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	ATL.NET	13.5 µs	1.00×	79.9 KiB	-	-	-	-	101.1	30.4	fastest comparator; cold first run 25.52 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	TagLib#	43.6 µs	3.24×	26.2 KiB	-	-	-	-	86.7	30.4	cold first run 14.82 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	OneMedia	14.4 µs	0.57×	6.3 KiB	-	-	-	-	95.3	30.3	cold first run 21.46 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	ATL.NET	31.9 µs	1.25×	78.6 KiB	-	-	-	-	92.0	30.4	cold first run 25.46 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	TagLib#	25.5 µs	1.00×	9.4 KiB	-	-	-	-	85.3	30.4	fastest comparator; cold first run 6.61 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	OneMedia	20.4 µs	0.57×	13.8 KiB	-	-	-	-	91.8	30.5	cold first run 27.73 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	ATL.NET	79.2 µs	2.21×	224.0 KiB	-	-	-	-	92.9	30.4	cold first run 36.88 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	TagLib#	35.9 µs	1.00×	17.8 KiB	-	-	-	-	85.6	30.4	fastest comparator; cold first run 9.47 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	OneMedia	10.2 µs	0.62×	3.6 KiB	-	-	-	-	89.2	30.4	cold first run 22.44 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	ATL.NET	19.8 µs	1.21×	75.5 KiB	-	-	-	-	96.4	30.5	cold first run 24.53 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	TagLib#	16.5 µs	1.00×	7.3 KiB	-	-	-	-	85.4	30.6	fastest comparator; cold first run 6.90 ms
generated/pcm/tagged-caf.caf	0.5 MiB	OneMedia	12.4 µs	0.26×	7.2 KiB	-	-	-	-	95.6	30.3	cold first run 21.62 ms
generated/pcm/tagged-caf.caf	0.5 MiB	ATL.NET	46.8 µs	1.00×	86.0 KiB	-	-	-	-	91.9	30.4	cold first run 28.55 ms
generated/pcm/tagged-caf.caf	0.5 MiB	TagLib#	fail	-	-	-	-	-	-	34.3	30.4	UnsupportedFormatException: generated/pcm/tagged-caf.caf (taglib/caf)

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB	Note
generated/pcm/aiff-pcm_s16be-mono44k.aiff	ExifTool	81.51 ms	76.99 ms – 83.18 ms	30.6
generated/pcm/aiff-pcm_s16be-mono44k.aiff	MediaInfo	6.20 ms	5.79 ms – 6.86 ms	9.5
generated/pcm/aiff-pcm_s16be-mono44k.aiff	ffprobe -show_format -show_streams	3.18 ms	2.41 ms – 4.14 ms	11.0
generated/pcm/tagged-aiff-id3.aiff	ExifTool	88.43 ms	85.06 ms – 88.63 ms	31.8
generated/pcm/tagged-aiff-id3.aiff	MediaInfo	7.52 ms	7.38 ms – 7.71 ms	9.5
generated/pcm/tagged-aiff-id3.aiff	ffprobe -show_format -show_streams	2.61 ms	2.24 ms – 2.95 ms	11.0
generated/pcm/tagged-aiff.aiff	ExifTool	78.66 ms	76.79 ms – 81.30 ms	30.7
generated/pcm/tagged-aiff.aiff	MediaInfo	7.17 ms	7.02 ms – 7.36 ms	9.7
generated/pcm/tagged-aiff.aiff	ffprobe -show_format -show_streams	2.60 ms	2.16 ms – 2.67 ms	11.0
generated/pcm/tagged-caf.caf	ExifTool	54.52 ms	53.07 ms – 55.31 ms	19.6	exit 1
generated/pcm/tagged-caf.caf	MediaInfo	5.51 ms	5.34 ms – 5.69 ms	9.2
generated/pcm/tagged-caf.caf	ffprobe -show_format -show_streams	2.62 ms	2.42 ms – 3.27 ms	10.7
generated/pcm/tagged-wav-bext.wav	ExifTool	46.70 ms	45.87 ms – 48.51 ms	18.4
generated/pcm/tagged-wav-bext.wav	MediaInfo	15.34 ms	15.04 ms – 15.40 ms	10.9
generated/pcm/tagged-wav-bext.wav	ffprobe -show_format -show_streams	2.38 ms	2.37 ms – 2.93 ms	11.5
generated/pcm/tagged-wav-id3.wav	ExifTool	51.61 ms	48.36 ms – 53.06 ms	18.4
generated/pcm/tagged-wav-id3.wav	MediaInfo	7.53 ms	6.84 ms – 7.61 ms	9.4
generated/pcm/tagged-wav-id3.wav	ffprobe -show_format -show_streams	17.37 ms	17.07 ms – 17.67 ms	11.5
generated/pcm/tagged-wav-info.wav	ExifTool	48.36 ms	48.20 ms – 51.67 ms	18.1
generated/pcm/tagged-wav-info.wav	MediaInfo	7.09 ms	6.86 ms – 7.88 ms	9.5
generated/pcm/tagged-wav-info.wav	ffprobe -show_format -show_streams	17.69 ms	17.31 ms – 20.44 ms	11.6
generated/pcm/wav-pcm_s16le-mono44k.wav	ExifTool	49.02 ms	47.17 ms – 51.08 ms	18.4
generated/pcm/wav-pcm_s16le-mono44k.wav	MediaInfo	6.77 ms	6.13 ms – 6.89 ms	9.4
generated/pcm/wav-pcm_s16le-mono44k.wav	ffprobe -show_format -show_streams	9.20 ms	9.17 ms – 11.77 ms	11.5

avi-demux: AVI: read every packet of every stream

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	OneMedia	47.8 µs	-	22.9 KiB	108.6 B	216	0.4	-	91.6	30.4	cold first run 23.74 ms
samples/avi/AV36_1.AVI	9.3 MiB	OneMedia	509.5 µs	-	22.8 KiB	23.6 B	988	8.8	-	91.2	30.4	cold first run 24.72 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	3.32 ms	-	22.4 KiB	2.5 B	9147	44.5	-	51.2	30.4	cold first run 29.68 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	OneMedia	11.26 ms	-	19.3 KiB	6.6 B	2984	179.9	-	46.1	30.4	cold first run 35.96 ms
generated/avi/large/odml-4p6gb.avi	4.33 GiB	OneMedia	383.92 ms	-	20.4 KiB	0.7 B	28750	4431.2	-	38.5	30.4	cold first run 414.99 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/avi/large/odml-4p6gb.avi	ffmpeg -c copy -f null	532.70 ms	532.70 ms – 532.70 ms	14.4
generated/avi/tagged-mpeg4-mp3.avi	ffmpeg -c copy -f null	4.98 ms	3.95 ms – 6.06 ms	13.8
samples/avi/AV36_1.AVI	ffmpeg -c copy -f null	10.25 ms	10.21 ms – 10.27 ms	12.7
samples/avi/DV-type1/dvformat2.avi	ffmpeg -c copy -f null	38.54 ms	38.37 ms – 48.93 ms	13.7
samples/avi/GoneNutty.avi	ffmpeg -c copy -f null	84.05 ms	52.01 ms – 85.03 ms	14.4

mpeg-demux: MPEG-TS/M2TS/PS: read every packet

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mpeg/ts/mpeg2-interlaced.ts	1.1 MiB	OneMedia	345.7 µs	-	254.6 KiB	976.6 B	267	1.1	-	96.1	30.4	cold first run 22.42 ms
generated/mpeg/ts/h264-high-50fps.ts	0.6 MiB	OneMedia	220.8 µs	-	223.6 KiB	588.6 B	389	0.5	-	100.3	30.4	cold first run 28.48 ms
generated/mpeg/m2ts/mpeg2-ac3.m2ts	0.9 MiB	OneMedia	272.7 µs	-	254.6 KiB	1158.5 B	225	0.8	-	97.5	30.4	cold first run 22.63 ms
generated/mpeg/ps/dvd-ac3-ntsc.vob	2.2 MiB	OneMedia	456.8 µs	-	699.3 KiB	2722.6 B	263	2.2	-	61.4	30.4	cold first run 20.71 ms
generated/mpeg/ps/mpeg2-svcd.mpg	1.2 MiB	OneMedia	285.4 µs	-	600.2 KiB	2243.0 B	274	1.2	-	57.6	30.4	cold first run 19.72 ms
samples/mpeg/HD-h264.ts	120.7 MiB	OneMedia	36.60 ms	-	17.1 MiB	4489.9 B	4002	117.2	-	88.6	30.4	cold first run 129.64 ms
generated/mpeg/large/ts-2gb.ts	2.21 GiB	OneMedia	604.01 ms	-	1.5 MiB	18.1 B	87738	2204.5	-	48.6	30.4	cold first run 749.04 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB	Note
generated/mpeg/large/ts-2gb.ts	ffmpeg -c copy -f null	962.05 ms	962.05 ms – 962.05 ms	24.2
generated/mpeg/m2ts/mpeg2-ac3.m2ts	ffmpeg -c copy -f null	104.74 ms	103.12 ms – 114.31 ms	12.8	exit 139
generated/mpeg/ps/dvd-ac3-ntsc.vob	ffmpeg -c copy -f null	8.71 ms	8.32 ms – 9.20 ms	16.0
generated/mpeg/ps/mpeg2-svcd.mpg	ffmpeg -c copy -f null	7.08 ms	6.74 ms – 7.17 ms	14.6
generated/mpeg/ts/h264-high-50fps.ts	ffmpeg -c copy -f null	105.52 ms	102.05 ms – 106.47 ms	12.8	exit 139
generated/mpeg/ts/mpeg2-interlaced.ts	ffmpeg -c copy -f null	96.40 ms	95.68 ms – 109.74 ms	12.8	exit 139
samples/mpeg/HD-h264.ts	ffmpeg -c copy -f null	92.14 ms	83.01 ms – 95.74 ms	35.6

asf-demux: ASF/WMV/WMA: read every packet

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/asf/wmv2-wmav2.wmv	0.4 MiB	OneMedia	54.0 µs	-	73.9 KiB	353.6 B	214	0.4	-	94.3	30.4	cold first run 25.50 ms
generated/asf/wmv2-pcm.asf	0.8 MiB	OneMedia	89.9 µs	-	65.3 KiB	269.8 B	248	0.7	-	90.8	30.4	cold first run 25.94 ms
generated/asf/msmpeg4v3-mp3.asf	0.4 MiB	OneMedia	58.1 µs	-	81.4 KiB	289.4 B	288	0.4	-	94.3	30.4	cold first run 27.84 ms
generated/large/over2gb.wmv	2.17 GiB	OneMedia	243.02 ms	-	2.0 MiB	93.0 B	23005	2203.5	-	39.9	30.3	cold first run 334.74 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/asf/msmpeg4v3-mp3.asf	ffmpeg -c copy -f null	5.66 ms	4.69 ms – 5.94 ms	14.2
generated/asf/wmv2-pcm.asf	ffmpeg -c copy -f null	4.65 ms	4.59 ms – 4.81 ms	13.9
generated/asf/wmv2-wmav2.wmv	ffmpeg -c copy -f null	4.68 ms	4.63 ms – 5.22 ms	14.2
generated/large/over2gb.wmv	ffmpeg -c copy -f null	270.66 ms	270.66 ms – 270.66 ms	19.4

repair-index: Matroska/AVI/MP4: rebuild the index of a healthy file into memory

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia	61.3 µs	-	1.1 MiB	562204.9 B	2	0.2	-	58.6	30.4	cold first run 21.64 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	10.71 ms	-	63.6 MiB	33320804.0 B	2	22.3	-	168.3	30.4	cold first run 46.61 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	OneMedia	233.6 µs	-	1.0 MiB	550488.0 B	2	0.4	-	54.9	30.5	cold first run 12.02 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	33.02 ms	-	129.3 MiB	67799420.0 B	2	44.7	-	400.1	30.4	cold first run 72.61 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	61.6 µs	-	1.1 MiB	552427.0 B	2	0.2	-	60.0	30.4	cold first run 15.07 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	13.76 ms	-	63.2 MiB	11048035.3 B	6	26.6	-	150.6	30.5	cold first run 48.46 ms

package-hls: HLS: CMAF segments and playlists written to disk

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	1.33 ms	-	740.7 KiB	379230.9 B	2	0.2	-	63.0	30.4	cold first run 74.90 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	21.20 ms	-	4.0 MiB	81654.1 B	52	25.8	-	73.3	30.5	cold first run 114.94 ms
blender/elephantsdream_teaser.mp4	29.2 MiB	OneMedia	22.59 ms	-	9.2 MiB	401225.3 B	24	29.2	-	75.7	30.4	cold first run 101.39 ms

avi-probe: AVI: open, track list, duration, tags

File	Size	Implementation	Median	Ratio	Alloc / run	Alloc / packet	Packets	Payload MiB	Tracks or tags	Peak MiB	Baseline MiB	Note
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	OneMedia	18.2 µs	0.62×	22.9 KiB	-	-	-	2	92.0	30.4	cold first run 20.47 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	ATL.NET	fail	-	-	-	-	-	-	37.3	30.4	NullReferenceException: Object reference not set to an instance of an object.
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	MetadataExtractor	29.2 µs	1.00×	67.9 KiB	-	-	-	11	90.0	30.4	fastest comparator; cold first run 8.31 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	TagLib#	84.2 µs	2.88×	77.6 KiB	-	-	-	2	86.3	30.5	cold first run 17.97 ms
samples/avi/AV36_1.AVI	9.3 MiB	OneMedia	18.7 µs	0.67×	22.8 KiB	-	-	-	2	92.0	30.4	cold first run 20.30 ms
samples/avi/AV36_1.AVI	9.3 MiB	ATL.NET	fail	-	-	-	-	-	-	37.3	30.3	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/AV36_1.AVI	9.3 MiB	MetadataExtractor	27.8 µs	1.00×	67.8 KiB	-	-	-	11	89.9	30.4	fastest comparator; cold first run 8.66 ms
samples/avi/AV36_1.AVI	9.3 MiB	TagLib#	60.0 µs	2.16×	40.6 KiB	-	-	-	2	85.8	30.3	cold first run 16.60 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	11.9 µs	0.42×	22.4 KiB	-	-	-	2	91.9	30.4	cold first run 19.04 ms
samples/avi/GoneNutty.avi	44.7 MiB	ATL.NET	fail	-	-	-	-	-	-	37.5	30.4	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/GoneNutty.avi	44.7 MiB	MetadataExtractor	28.1 µs	1.00×	67.8 KiB	-	-	-	11	90.1	30.5	fastest comparator; cold first run 8.65 ms
samples/avi/GoneNutty.avi	44.7 MiB	TagLib#	60.9 µs	2.17×	39.3 KiB	-	-	-	2	86.6	30.4	cold first run 16.91 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	OneMedia	11.1 µs	0.43×	19.1 KiB	-	-	-	2	91.7	30.4	cold first run 18.43 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	ATL.NET	fail	-	-	-	-	-	-	37.5	30.5	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	MetadataExtractor	25.8 µs	1.00×	68.4 KiB	-	-	-	11	90.0	30.5	fastest comparator; cold first run 8.41 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	TagLib#	63.7 µs	2.48×	291.4 KiB	-	-	-	2	89.8	30.4	cold first run 16.63 ms
generated/avi/large/odml-4p6gb.avi	4.33 GiB	OneMedia	15.9 µs	0.52×	20.2 KiB	-	-	-	2	91.7	30.4	cold first run 18.79 ms
generated/avi/large/odml-4p6gb.avi	4.33 GiB	ATL.NET	fail	-	-	-	-	-	-	37.3	30.4	NullReferenceException: Object reference not set to an instance of an object.
generated/avi/large/odml-4p6gb.avi	4.33 GiB	MetadataExtractor	30.7 µs	1.00×	68.0 KiB	-	-	-	11	90.0	30.4	fastest comparator; cold first run 8.81 ms
generated/avi/large/odml-4p6gb.avi	4.33 GiB	TagLib#	69.8 µs	2.27×	96.9 KiB	-	-	-	2	89.9	30.5	cold first run 16.61 ms

Reference tools, run as processes (wall time including start-up, peak resident set); information only:

File	Tool	Wall median	Wall min – max	Peak MiB
generated/avi/large/odml-4p6gb.avi	ExifTool	50.15 ms	50.15 ms – 50.15 ms	18.1
generated/avi/large/odml-4p6gb.avi	MediaInfo	12.23 ms	12.23 ms – 12.23 ms	10.4
generated/avi/large/odml-4p6gb.avi	ffprobe -show_format -show_streams	4.58 ms	4.58 ms – 4.58 ms	11.8
generated/avi/tagged-mpeg4-mp3.avi	ExifTool	52.27 ms	51.21 ms – 52.60 ms	18.8
generated/avi/tagged-mpeg4-mp3.avi	MediaInfo	10.01 ms	9.82 ms – 10.12 ms	11.7
generated/avi/tagged-mpeg4-mp3.avi	ffprobe -show_format -show_streams	3.26 ms	3.05 ms – 3.68 ms	12.4
samples/avi/AV36_1.AVI	ExifTool	52.58 ms	49.10 ms – 52.91 ms	18.4
samples/avi/AV36_1.AVI	MediaInfo	7.88 ms	7.85 ms – 8.15 ms	10.3
samples/avi/AV36_1.AVI	ffprobe -show_format -show_streams	3.03 ms	2.59 ms – 3.41 ms	11.5
samples/avi/DV-type1/dvformat2.avi	ExifTool	50.83 ms	49.55 ms – 54.64 ms	18.1
samples/avi/DV-type1/dvformat2.avi	MediaInfo	14.13 ms	14.10 ms – 14.26 ms	12.0
samples/avi/DV-type1/dvformat2.avi	ffprobe -show_format -show_streams	5.25 ms	5.09 ms – 5.51 ms	12.3
samples/avi/GoneNutty.avi	ExifTool	51.72 ms	49.27 ms – 52.81 ms	18.8
samples/avi/GoneNutty.avi	MediaInfo	24.18 ms	23.58 ms – 24.55 ms	12.2
samples/avi/GoneNutty.avi	ffprobe -show_format -show_streams	4.26 ms	3.75 ms – 4.43 ms	13.4

Machine and versions

Jobs

Against the bar

Subtitle rows (SubtitlesParser 1.5.1 and Subtitle Edit core 5.3.0 as comparators; median of 30 samples)

Tables

mp4-demux: MP4/MOV: read every packet of every track

mp4-audio: MP4/MOV: read the audio track's packets

mp4-probe: MP4/MOV: open, track list, duration, tags

mkv-demux: Matroska/WebM: read every packet

mkv-probe: Matroska/WebM: open, track list, duration

mp4-mux: MP4: write the first AAC track's frames from memory to an MP4 in memory

mp4-remux: MP4: read the first AAC track from a file and write it as an MP4 in memory

tagw-id3: MP3: change title, artist, album and comment; the edited file in memory

tagw-flac: FLAC: change title, artist, album and comment; the edited file in memory

tagw-ilst: MP4/M4A: change title, artist, album and comment in ilst; the edited file in memory

tagw-riff: WAV: change LIST INFO title, artist, album and comment; the edited file in memory

tagw-mkv: Matroska: change title, artist, album and comment; the edited file in memory

remux-mem: Remux of the files past 4 GiB into MP4 and Matroska, output to disk: peak resident memory

playable: MakePlayable (generic MP4): Matroska H.264+AAC to MP4; information

mkv-mux: Matroska/WebM: read every packet and write it to a new Matroska file (no managed Matroska writer to compare with)

mp3-tags: MP3: open and read the common tags

xiph-tags: FLAC/Ogg: open, tags, duration

xiph-demux: Ogg/FLAC/FLV: read every packet

asf-tags: ASF/WMA/WMV: open and read the tags (title, artist, album, genre, pictures)

pcm-tags: WAVE/AIFF/CAF: open, duration, tags

avi-demux: AVI: read every packet of every stream

mpeg-demux: MPEG-TS/M2TS/PS: read every packet

asf-demux: ASF/WMV/WMA: read every packet

repair-index: Matroska/AVI/MP4: rebuild the index of a healthy file into memory

package-hls: HLS: CMAF segments and playlists written to disk

avi-probe: AVI: open, track list, duration, tags

tagw-ilst: MP4/M4A: change title, artist, album and comment in `ilst`; the edited file in memory

tagw-riff: WAV: change `LIST INFO` title, artist, album and comment; the edited file in memory