Speed, memory and I/O rows, 0.8: arm64 (Apple M2) · 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: arm64-mac; Apple M2; 8 logical cores; macOS 27.0.1 Arm64; ISA neon crc32 aes dotprod; runtime 10.0.11 (.NET 10.0.11); 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 8.0 Copyright (c) 2000-2025 the FFmpeg developers; MP4Box - GPAC version 26.07-revrelease; 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	000549 (bench)	2026-11-02 21:17Z	demux and probe (mp4-demux, mp4-audio, mp4-probe, mkv-demux, mkv-probe)	before 2.82; during mean 2.89, max 3.15 over 26 samples at 5 s; after 2.96	2.1 min
G2	000546 (bench)	2026-11-02 21:06Z	mux, remux, tag write (mp4-mux, mp4-remux, tagw-*, mkv-mux, remux-mem, playable)	before 5.98; during mean 5.47, max 6.39 over 24 samples at 5 s; after 4.20	1.9 min
G3	000547 (bench)	2026-11-02 21:10Z	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 4.20; during mean 3.35, max 4.20 over 47 samples at 5 s; after 3.05	3.9 min
G4	000548 (bench)	-	subtitle parse and convert (subsbench -n 30 20000 100000)	before: `15:10 up 14 days, 18:38, 1 user, load averages: 3.19 3.77 3.48`; after: `15:14 up 14 days, 18:42, 1 user, load averages: 3.46 3.53 3.43`	-
G5	000550 (bench)	2026-11-02 22:28Z	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 3.46; during mean 2.90, max 3.51 over 13 samples at 5 s; after 2.52	~2 min

Against the bar

Row	Files with a ratio	Geomean	Worst	Verdict
mp4-demux	3/4	0.08×	0.19×	at the bar
mp4-audio	2/4	0.51×	0.56×	at the bar
mp4-probe	4/4	0.12×	0.28×	at the bar
mkv-demux	5/5	0.25×	0.33×	at the bar
mkv-probe	5/5	0.56×	0.72×	at the bar
mp4-mux	3/3	0.09×	0.18×	at the bar
mp4-remux	3/3	0.09×	0.17×	at the bar
tagw-id3	4/4	0.30×	0.35×	at the bar
tagw-flac	2/2	0.32×	0.32×	at the bar
tagw-ilst	2/2	0.34×	0.37×	at the bar
tagw-riff	3/3	0.37×	0.38×	at the bar
tagw-mkv	1/2	0.76×	0.76×	at the bar
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	0.61×	0.87×	at the bar
xiph-tags	8/8	0.73×	1.13×	at the bar
xiph-demux	0/7	-	-	no managed comparator, so the row passes (times are information)
asf-tags	6/6	0.72×	0.94×	at the bar
pcm-tags	8/8	0.61×	0.88×	at the bar
avi-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	0/2	-	-	no managed comparator, so the row passes (times are information)
avi-probe	4/4	0.57×	0.69×	at the bar
subs-parse	8/8	0.51×	1.07×	at the bar
subs-convert	6/6	0.42×	0.90×	at the bar

Overall geometric mean of every per-file ratio above (rows with a managed comparator): 0.399× over 84 ratios; worst single ratio 1.13× (blender/big_buck_bunny_480p_stereo.ogg).

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	7.75 (4.95)	10754	SubtitleEdit core	7.24 (5.48)	13558	1.07×
20000	parse vtt	4.44 (4.40)	11327	SubtitleEdit core	34.58 (28.57)	35599	0.13×
20000	parse ass	10.57 (6.81)	12372	SubtitleEdit core	11.89 (8.75)	19780	0.89×
20000	parse ttml	49.37 (37.67)	43599	SubtitleEdit core	94.82 (84.72)	75772	0.52×
20000	convert srt->vtt	18.10 (8.49)	20119	SubtitleEdit core	27.01 (21.98)	36378	0.67×
20000	convert srt->ass	16.11 (14.75)	22345	SubtitleEdit core	17.94 (14.17)	23809	0.90×
20000	convert srt->ttml	19.61 (18.38)	27530	SubtitleEdit core	121.40 (118.80)	300960	0.16×
100000	parse srt	68.45 (39.69)	53812	SubtitleEdit core	63.95 (36.00)	67891	1.07×
100000	parse vtt	35.42 (32.11)	56580	SubtitleEdit core	192.10 (174.06)	177532	0.18×
100000	parse ass	77.84 (54.65)	61387	SubtitleEdit core	80.92 (66.16)	98678	0.96×
100000	parse ttml	200.71 (197.29)	215980	SubtitleEdit core	571.28 (514.78)	377551	0.35×
100000	convert srt->vtt	63.20 (53.90)	100586	SubtitleEdit core	184.01 (157.54)	181957	0.34×
100000	convert srt->ass	76.89 (58.71)	108829	SubtitleEdit core	108.41 (71.32)	119281	0.71×
100000	convert srt->ttml	144.89 (99.74)	137575	SubtitleEdit core	608.05 (569.29)	1505074	0.24×

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	40.8 µs	0.03×	23.6 KiB	78.3 B	309	0.2	-	-	42.1	cold first run 21.35 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	1.39 ms	1.00×	1.4 MiB	4633.4 B	309	0.2	-	-	42.2	cold first run 55.72 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	2.58 ms	0.08×	57.7 KiB	3.2 B	18671	26.5	-	-	42.2	cold first run 28.17 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	31.27 ms	1.00×	42.6 MiB	2390.8 B	18671	26.5	-	-	42.2	cold first run 94.45 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	55.25 ms	0.19×	2.1 MiB	52.7 B	42276	691.1	-	-	42.1	cold first run 86.61 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	SharpMP4	286.00 ms	1.00×	801.0 MiB	19866.2 B	42276	691.1	-	-	42.1	cold first run 816.66 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	56.99 ms	-	2.1 MiB	51.7 B	42276	691.1	-	-	42.3	cold first run 91.16 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	fail	-	-	-	-	-	-	-	42.1	IndexOutOfRangeException: Index was outside the bounds of the array.

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	184.28 ms	184.27 ms – 206.66 ms	66.7
generated/bench/frag-bbb-1080p.mp4	ffmpeg -c copy -f null	255.00 ms	215.75 ms – 269.58 ms	110.9
generated/mp4/h264-aac.mp4	ffmpeg -c copy -f null	35.42 ms	35.00 ms – 39.02 ms	18.1
samples/MPEG-4/video.mp4	ffmpeg -c copy -f null	61.50 ms	60.95 ms – 62.14 ms	17.4

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	33.9 µs	0.47×	23.6 KiB	128.0 B	189	0.0	-	-	42.1	cold first run 21.58 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneAudio Mp4PacketSource	72.9 µs	1.00×	71.6 KiB	388.2 B	189	0.0	-	-	42.2	cold first run 10.72 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia, length asked of the file each time	45.0 µs	0.62×	23.7 KiB	128.6 B	189	0.0	-	-	42.2	cold first run 23.02 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	366.3 µs	0.56×	57.7 KiB	8.2 B	7200	1.9	-	-	42.2	cold first run 22.15 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneAudio Mp4PacketSource	654.8 µs	1.00×	97.6 KiB	13.9 B	7200	1.9	-	-	42.3	cold first run 10.39 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia, length asked of the file each time	370.5 µs	0.57×	57.8 KiB	8.2 B	7200	1.9	-	-	42.2	cold first run 22.23 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	4.19 ms	-	62.5 KiB	2.3 B	27960	31.1	-	-	42.2	cold first run 32.17 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneAudio Mp4PacketSource	fail	-	-	-	-	-	-	-	42.2	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	4.18 ms	-	62.6 KiB	2.3 B	27960	31.1	-	-	42.3	cold first run 32.53 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	4.69 ms	-	21.7 KiB	0.8 B	27960	31.1	-	-	42.2	cold first run 39.09 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneAudio Mp4PacketSource	fail	-	-	-	-	-	-	-	42.2	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	4.91 ms	-	21.8 KiB	0.8 B	27960	31.1	-	-	42.2	cold first run 39.41 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	17.8 µs	0.28×	23.6 KiB	-	-	-	2	-	42.2	cold first run 20.52 ms
generated/mp4/h264-aac.mp4	0.2 MiB	ATL.NET	108.1 µs	1.72×	146.6 KiB	-	-	-	0	-	42.1	cold first run 34.68 ms
generated/mp4/h264-aac.mp4	0.2 MiB	MetadataExtractor	81.1 µs	1.29×	77.7 KiB	-	-	-	48	-	42.2	cold first run 11.42 ms
generated/mp4/h264-aac.mp4	0.2 MiB	TagLib#	62.9 µs	1.00×	36.7 KiB	-	-	-	2	-	42.2	fastest comparator; cold first run 9.55 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	23.4 µs	0.20×	57.7 KiB	-	-	-	6	-	42.2	cold first run 19.94 ms
samples/MPEG-4/video.mp4	26.6 MiB	ATL.NET	408.1 µs	3.42×	151.7 KiB	-	-	-	0	-	42.2	cold first run 38.92 ms
samples/MPEG-4/video.mp4	26.6 MiB	MetadataExtractor	154.6 µs	1.30×	91.8 KiB	-	-	-	96	-	42.2	cold first run 10.44 ms
samples/MPEG-4/video.mp4	26.6 MiB	TagLib#	119.3 µs	1.00×	78.2 KiB	-	-	-	2	-	42.1	fastest comparator; cold first run 10.31 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	OneMedia	40.6 µs	0.28×	62.4 KiB	-	-	-	3	-	42.2	cold first run 20.70 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	ATL.NET	976.1 µs	6.68×	229.2 KiB	-	-	-	0	-	42.2	cold first run 41.57 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	MetadataExtractor	146.1 µs	1.00×	87.7 KiB	-	-	-	61	-	42.1	fastest comparator; cold first run 11.92 ms
blender/big_buck_bunny_1080p_h264.mov	691.5 MiB	TagLib#	fail	-	-	-	-	-	-	-	42.1	UnsupportedFormatException: blender/big_buck_bunny_1080p_h264.mov (taglib/mov)
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	16.2 µs	0.01×	20.9 KiB	-	-	-	3	-	42.3	cold first run 18.50 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	ATL.NET	5.18 ms	4.05×	483.7 KiB	-	-	-	0	-	42.3	cold first run 51.04 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	MetadataExtractor	4.57 ms	3.57×	183.6 KiB	-	-	-	60	-	42.1	cold first run 15.41 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	TagLib#	1.28 ms	1.00×	521.2 KiB	-	-	-	2	-	42.3	fastest comparator; cold first run 11.20 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/big_buck_bunny_1080p_h264.mov	ExifTool	89.05 ms	88.47 ms – 89.95 ms	27.0
blender/big_buck_bunny_1080p_h264.mov	MP4Box -info	26.53 ms	26.27 ms – 28.10 ms	9.2
blender/big_buck_bunny_1080p_h264.mov	MediaInfo	36.67 ms	35.80 ms – 37.48 ms	14.7
blender/big_buck_bunny_1080p_h264.mov	ffprobe -show_format -show_streams	37.58 ms	37.01 ms – 37.66 ms	26.2
generated/bench/frag-bbb-1080p.mp4	ExifTool	177.31 ms	177.23 ms – 179.07 ms	27.4
generated/bench/frag-bbb-1080p.mp4	MP4Box -info	28.50 ms	28.44 ms – 29.46 ms	11.6
generated/bench/frag-bbb-1080p.mp4	MediaInfo	51.07 ms	50.87 ms – 51.52 ms	14.5
generated/bench/frag-bbb-1080p.mp4	ffprobe -show_format -show_streams	63.59 ms	63.34 ms – 63.93 ms	40.1
generated/mp4/h264-aac.mp4	ExifTool	87.02 ms	84.54 ms – 87.05 ms	25.6
generated/mp4/h264-aac.mp4	MP4Box -info	26.23 ms	25.88 ms – 32.68 ms	8.6
generated/mp4/h264-aac.mp4	MediaInfo	27.60 ms	27.08 ms – 29.42 ms	11.0
generated/mp4/h264-aac.mp4	ffprobe -show_format -show_streams	34.27 ms	33.45 ms – 42.62 ms	17.9
samples/MPEG-4/video.mp4	ExifTool	120.02 ms	120.01 ms – 121.07 ms	40.0
samples/MPEG-4/video.mp4	MP4Box -info	26.15 ms	25.79 ms – 27.32 ms	8.6
samples/MPEG-4/video.mp4	MediaInfo	28.33 ms	27.96 ms – 28.84 ms	11.5
samples/MPEG-4/video.mp4	ffprobe -show_format -show_streams	34.69 ms	34.25 ms – 35.46 ms	16.5

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	94.6 µs	0.21×	1.0 MiB	3513.6 B	309	0.2	-	-	42.2	cold first run 23.89 ms
generated/mkv/h264-aac.mkv	0.2 MiB	OneMedia, length asked of the file each time	214.2 µs	0.48×	1.0 MiB	3513.9 B	309	0.2	-	-	42.2	cold first run 23.95 ms
generated/mkv/h264-aac.mkv	0.2 MiB	StefH Matroska	444.0 µs	1.00×	672.2 KiB	2227.5 B	309	0.2	-	-	42.3	cold first run 16.31 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	2.29 ms	0.21×	1.0 MiB	189.4 B	5735	22.2	-	-	42.1	cold first run 29.01 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia, length asked of the file each time	3.22 ms	0.29×	1.0 MiB	189.4 B	5735	22.2	-	-	42.2	cold first run 30.46 ms
matroska-test-files/test1.mkv	22.3 MiB	StefH Matroska	11.04 ms	1.00×	46.0 MiB	18698.1 B	2582	22.2	-	-	42.2	packet count differs from OneMedia's 5735; cold first run 26.67 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	2.75 ms	0.21×	1.0 MiB	254.5 B	4298	30.3	-	-	42.3	cold first run 29.03 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia, length asked of the file each time	3.35 ms	0.25×	1.0 MiB	254.5 B	4298	30.3	-	-	42.2	cold first run 28.87 ms
matroska-test-files/test5.mkv	30.3 MiB	StefH Matroska	13.22 ms	1.00×	61.6 MiB	41197.3 B	1568	30.3	-	-	42.2	packet count differs from OneMedia's 4298; cold first run 27.72 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	139.51 ms	0.33×	1.0 MiB	22.2 B	49323	1125.2	-	-	42.2	cold first run 151.33 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia, length asked of the file each time	143.39 ms	0.34×	1.0 MiB	22.2 B	49323	1125.2	-	-	42.2	cold first run 160.55 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	StefH Matroska	416.85 ms	1.00×	2265.6 MiB	93606.3 B	25379	1125.2	-	-	42.1	packet count differs from OneMedia's 49323; cold first run 551.35 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	51.95 ms	0.30×	1.0 MiB	13.7 B	80000	544.6	-	-	42.2	cold first run 103.85 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia, length asked of the file each time	61.81 ms	0.36×	1.0 MiB	13.7 B	80000	544.6	-	-	42.2	cold first run 114.99 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	StefH Matroska	171.55 ms	1.00×	1097.5 MiB	44895.2 B	25634	544.7	-	-	42.1	packet count differs from OneMedia's 80000; cold first run 215.35 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	ffmpeg -c copy -f null	344.54 ms	344.54 ms – 344.54 ms	53.2
blender/Sintel.2010.1080p.mkv	mkvextract tracks (first track)	203.37 ms	203.37 ms – 203.37 ms	27.0
blender/tears_of_steel_1080p.webm	ffmpeg -c copy -f null	199.84 ms	192.85 ms – 201.54 ms	19.3
blender/tears_of_steel_1080p.webm	mkvextract tracks (first track)	132.81 ms	131.96 ms – 135.36 ms	29.5
generated/mkv/h264-aac.mkv	ffmpeg -c copy -f null	34.19 ms	33.90 ms – 35.17 ms	17.8
generated/mkv/h264-aac.mkv	mkvextract tracks (first track)	51.07 ms	50.89 ms – 62.56 ms	15.5
matroska-test-files/test1.mkv	ffmpeg -c copy -f null	45.50 ms	44.69 ms – 47.84 ms	16.3
matroska-test-files/test1.mkv	mkvextract tracks (first track)	56.19 ms	56.06 ms – 56.50 ms	24.4
matroska-test-files/test5.mkv	ffmpeg -c copy -f null	59.66 ms	58.81 ms – 60.14 ms	26.8
matroska-test-files/test5.mkv	mkvextract tracks (first track)	56.96 ms	56.94 ms – 59.40 ms	24.1

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	14.2 µs	0.58×	36.1 KiB	-	-	-	2	-	42.3	cold first run 16.41 ms
generated/mkv/h264-aac.mkv	0.2 MiB	NEbml element reader	24.3 µs	1.00×	68.7 KiB	-	-	-	2	-	42.2	cold first run 3.10 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	13.7 µs	0.62×	36.6 KiB	-	-	-	2	-	42.1	cold first run 17.18 ms
matroska-test-files/test1.mkv	22.3 MiB	NEbml element reader	22.1 µs	1.00×	68.3 KiB	-	-	-	2	-	42.2	cold first run 3.02 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	17.4 µs	0.45×	44.2 KiB	-	-	-	11	-	42.2	cold first run 16.63 ms
matroska-test-files/test5.mkv	30.3 MiB	NEbml element reader	38.3 µs	1.00×	72.8 KiB	-	-	-	11	-	42.2	cold first run 3.40 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	18.0 µs	0.48×	44.9 KiB	-	-	-	12	-	42.2	cold first run 15.82 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	NEbml element reader	37.4 µs	1.00×	73.3 KiB	-	-	-	12	-	42.1	cold first run 2.69 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	16.2 µs	0.72×	43.9 KiB	-	-	-	2	-	42.2	cold first run 15.76 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	NEbml element reader	22.7 µs	1.00×	68.2 KiB	-	-	-	2	-	42.1	cold first run 2.80 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	77.54 ms	77.54 ms – 77.54 ms	21.3
blender/Sintel.2010.1080p.mkv	MediaInfo	146.78 ms	146.78 ms – 146.78 ms	12.3
blender/Sintel.2010.1080p.mkv	ffprobe -show_format -show_streams	38.55 ms	38.55 ms – 38.55 ms	21.1
blender/Sintel.2010.1080p.mkv	mkvinfo	52.14 ms	52.14 ms – 52.14 ms	14.7
blender/Sintel.2010.1080p.mkv	mkvmerge -J	56.28 ms	56.28 ms – 56.28 ms	20.1
blender/tears_of_steel_1080p.webm	ExifTool	75.00 ms	74.09 ms – 75.33 ms	21.3
blender/tears_of_steel_1080p.webm	MediaInfo	59.60 ms	59.21 ms – 64.00 ms	11.6
blender/tears_of_steel_1080p.webm	ffprobe -show_format -show_streams	36.59 ms	35.29 ms – 37.93 ms	14.5
blender/tears_of_steel_1080p.webm	mkvinfo	52.11 ms	51.97 ms – 52.72 ms	14.5
blender/tears_of_steel_1080p.webm	mkvmerge -J	54.52 ms	54.19 ms – 55.07 ms	19.0
generated/mkv/h264-aac.mkv	ExifTool	75.54 ms	75.27 ms – 81.69 ms	21.3
generated/mkv/h264-aac.mkv	MediaInfo	30.77 ms	29.42 ms – 44.32 ms	10.5
generated/mkv/h264-aac.mkv	ffprobe -show_format -show_streams	36.28 ms	34.96 ms – 79.70 ms	18.9
generated/mkv/h264-aac.mkv	mkvinfo	52.01 ms	51.95 ms – 59.02 ms	14.6
generated/mkv/h264-aac.mkv	mkvmerge -J	53.08 ms	52.78 ms – 72.64 ms	16.7
matroska-test-files/test1.mkv	ExifTool	74.54 ms	73.87 ms – 74.92 ms	21.3
matroska-test-files/test1.mkv	MediaInfo	30.98 ms	30.48 ms – 52.40 ms	10.8
matroska-test-files/test1.mkv	ffprobe -show_format -show_streams	35.89 ms	35.64 ms – 38.58 ms	15.3
matroska-test-files/test1.mkv	mkvinfo	52.18 ms	51.93 ms – 52.47 ms	14.8
matroska-test-files/test1.mkv	mkvmerge -J	54.71 ms	53.76 ms – 54.75 ms	20.1
matroska-test-files/test5.mkv	ExifTool	109.25 ms	107.72 ms – 110.03 ms	36.9
matroska-test-files/test5.mkv	MediaInfo	46.88 ms	45.52 ms – 128.81 ms	11.4
matroska-test-files/test5.mkv	ffprobe -show_format -show_streams	52.50 ms	51.30 ms – 52.67 ms	24.6
matroska-test-files/test5.mkv	mkvinfo	52.26 ms	52.05 ms – 52.54 ms	16.2
matroska-test-files/test5.mkv	mkvmerge -J	55.96 ms	55.59 ms – 56.56 ms	23.1

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	46.1 µs	0.06×	1.0 MiB	5639.5 B	189	0.0	-	-	42.2	cold first run 39.28 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia, movie box last	45.0 µs	0.06×	1.0 MiB	5610.2 B	189	0.0	-	-	42.2	cold first run 50.77 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	779.5 µs	1.00×	1.5 MiB	8079.4 B	189	0.0	-	-	42.3	cold first run 45.16 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	660.2 µs	0.06×	3.0 MiB	439.4 B	7200	2.0	-	-	42.4	cold first run 56.32 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia, movie box last	665.4 µs	0.06×	3.0 MiB	438.5 B	7200	2.0	-	-	42.3	cold first run 43.52 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	11.63 ms	1.00×	17.5 MiB	2550.9 B	7200	2.0	-	-	42.2	cold first run 73.82 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	21.28 ms	0.18×	63.0 MiB	2363.3 B	27960	31.2	-	-	42.2	cold first run 108.77 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia, movie box last	12.10 ms	0.11×	63.0 MiB	2363.1 B	27960	31.2	-	-	42.2	cold first run 86.96 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	115.24 ms	1.00×	103.7 MiB	3889.9 B	27960	31.3	-	-	42.4	cold first run 277.28 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	185.4 µs	0.07×	1.1 MiB	6376.7 B	189	0.0	-	-	42.3	cold first run 71.37 ms
generated/mp4/h264-aac.mp4	0.2 MiB	SharpMP4	2.63 ms	1.00×	2.6 MiB	14687.2 B	189	0.0	-	-	42.4	cold first run 95.25 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	2.16 ms	0.07×	3.2 MiB	465.0 B	7200	2.0	-	-	42.2	cold first run 73.88 ms
samples/MPEG-4/video.mp4	26.6 MiB	SharpMP4	32.03 ms	1.00×	34.7 MiB	5051.3 B	7200	2.0	-	-	42.2	cold first run 151.83 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	OneMedia	27.09 ms	0.17×	63.2 MiB	2368.3 B	27960	31.2	-	-	42.3	cold first run 131.18 ms
generated/bench/frag-bbb-1080p.mp4	691.5 MiB	SharpMP4	160.74 ms	1.00×	243.3 MiB	9122.6 B	27960	31.3	-	-	42.2	cold first run 535.20 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
generated/bench/frag-bbb-1080p.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	100.29 ms	99.64 ms – 101.53 ms	88.1
generated/mp4/h264-aac.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	34.14 ms	33.98 ms – 43.07 ms	19.0
samples/MPEG-4/video.mp4	ffmpeg -c copy -map 0:a:0 -f mp4	57.38 ms	55.93 ms – 64.54 ms	20.4

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	6.9 µs	0.31×	77.7 KiB	79536.0 B	1	-	-	-	42.2	cold first run 26.47 ms
generated/audio-es/tagged/id3v24-basic.mp3	ATL.NET	192.4 µs	8.74×	938.2 KiB	960749.4 B	1	-	-	-	42.1	cold first run 48.78 ms
generated/audio-es/tagged/id3v24-basic.mp3	TagLib#	22.0 µs	1.00×	140.5 KiB	143835.9 B	1	-	-	-	42.2	fastest comparator; cold first run 18.18 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	OneMedia	7.3 µs	0.35×	79.2 KiB	81136.0 B	1	-	-	-	42.1	cold first run 26.50 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	ATL.NET	186.1 µs	8.92×	1.0 MiB	1073624.9 B	1	-	-	-	42.2	cold first run 51.57 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	TagLib#	20.9 µs	1.00×	137.9 KiB	141202.0 B	1	-	-	-	42.2	fastest comparator; cold first run 15.16 ms
generated/audio-es/tagged/id3v22-basic.mp3	OneMedia	7.6 µs	0.28×	80.1 KiB	82064.0 B	1	-	-	-	42.1	cold first run 26.65 ms
generated/audio-es/tagged/id3v22-basic.mp3	ATL.NET	193.7 µs	7.10×	937.5 KiB	959957.1 B	1	-	-	-	42.2	cold first run 48.49 ms
generated/audio-es/tagged/id3v22-basic.mp3	TagLib#	27.3 µs	1.00×	138.2 KiB	141554.0 B	1	-	-	-	42.0	fastest comparator; cold first run 18.89 ms
generated/audio-es/tagged/apev2-only.mp3	OneMedia	4.4 µs	0.27×	67.5 KiB	69144.0 B	1	-	-	-	42.1	cold first run 26.20 ms
generated/audio-es/tagged/apev2-only.mp3	ATL.NET	248.9 µs	15.18×	1.0 MiB	1083814.4 B	1	-	-	-	42.2	cold first run 48.17 ms
generated/audio-es/tagged/apev2-only.mp3	TagLib#	16.4 µs	1.00×	116.8 KiB	119629.9 B	1	-	-	-	42.1	fastest comparator; cold first run 18.64 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	3.8 µs	0.31×	70.3 KiB	71944.0 B	1	-	-	-	42.1	cold first run 19.84 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	ATL.NET	153.0 µs	12.82×	783.9 KiB	802696.6 B	1	-	-	-	42.1	cold first run 40.66 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	TagLib#	11.9 µs	1.00×	144.1 KiB	147561.8 B	1	-	-	-	42.2	fastest comparator; cold first run 8.71 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	OneMedia	4.2 µs	0.32×	72.9 KiB	74664.0 B	1	-	-	-	42.2	cold first run 19.74 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	ATL.NET	155.7 µs	11.90×	814.6 KiB	834177.4 B	1	-	-	-	42.1	cold first run 40.85 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	TagLib#	13.1 µs	1.00×	150.9 KiB	154537.8 B	1	-	-	-	42.1	fastest comparator; cold first run 8.72 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	28.9 µs	0.32×	366.3 KiB	375056.0 B	1	-	-	-	42.0	cold first run 22.75 ms
generated/mp4/h264-aac-tags.mp4	0.2 MiB	ATL.NET	1.70 ms	18.61×	1.9 MiB	2027396.9 B	1	-	-	-	42.1	cold first run 53.83 ms
generated/mp4/h264-aac-tags.mp4	0.2 MiB	TagLib#	91.5 µs	1.00×	413.9 KiB	423820.2 B	1	-	-	-	42.1	fastest comparator; cold first run 11.40 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	OneMedia	6.6 µs	0.37×	137.8 KiB	141088.0 B	1	-	-	-	42.1	cold first run 21.97 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	ATL.NET	263.2 µs	14.49×	1.1 MiB	1102529.7 B	1	-	-	-	42.1	cold first run 53.87 ms
generated/editlist/audio-aac-priming.m4a	0.0 MiB	TagLib#	18.2 µs	1.00×	142.3 KiB	145737.8 B	1	-	-	-	42.1	fastest comparator; cold first run 11.59 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	49.8 µs	0.37×	533.1 KiB	545856.0 B	1	-	-	-	42.1	cold first run 20.02 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	ATL.NET	193.6 µs	1.43×	1.1 MiB	1181619.4 B	1	-	-	-	42.2	cold first run 41.42 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	TagLib#	135.3 µs	1.00×	582.8 KiB	596757.3 B	1	-	-	-	42.1	fastest comparator; cold first run 16.48 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	OneMedia	57.8 µs	0.38×	863.0 KiB	883743.8 B	1	-	-	-	42.1	cold first run 20.55 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	ATL.NET	541.2 µs	3.56×	1.8 MiB	1903091.6 B	1	-	-	-	42.2	cold first run 43.83 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	TagLib#	152.1 µs	1.00×	911.1 KiB	932924.2 B	1	-	-	-	42.1	fastest comparator; cold first run 16.64 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	OneMedia	49.8 µs	0.37×	533.1 KiB	545856.0 B	1	-	-	-	42.2	cold first run 20.17 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	ATL.NET	199.6 µs	1.48×	1.1 MiB	1181618.7 B	1	-	-	-	42.1	cold first run 41.44 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	TagLib#	134.9 µs	1.00×	582.8 KiB	596768.2 B	1	-	-	-	42.2	fastest comparator; cold first run 16.54 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	0.3 MiB	OneMedia	42.4 µs	0.76×	306.9 KiB	314232.0 B	1	-	-	-	42.0	cold first run 39.40 ms
generated/mkv/h264-two-audio-tags.mkv	0.3 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.1	NullReferenceException: Object reference not set to an instance of an object.
generated/mkv/h264-two-audio-tags.mkv	0.3 MiB	TagLib#	56.0 µs	1.00×	323.1 KiB	330838.0 B	1	-	-	-	42.1	cold first run 9.67 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	2.14 ms	-	22.3 MiB	23393024.0 B	1	-	-	-	42.1	cold first run 45.75 ms
matroska-test-files/test1.mkv	22.3 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.1	NullReferenceException: Object reference not set to an instance of an object.
matroska-test-files/test1.mkv	22.3 MiB	TagLib#	fail	-	-	-	-	-	-	-	42.1	InvalidOperationException: Invalid EBML format Read

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	12.19 ms	-	1.8 MiB	1840856.0 B	1	0.2	-	-	42.1	cold first run 139.72 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	27.33 ms	27.02 ms – 27.83 ms	18.1

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	214.3 µs	-	1.3 MiB	4342.4 B	309	0.2	-	-	42.2	cold first run 47.34 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	4.26 ms	-	9.2 MiB	1674.4 B	5735	22.2	-	-	42.2	cold first run 50.19 ms
matroska-test-files/test5.mkv	30.3 MiB	OneMedia	4.66 ms	-	5.1 MiB	1232.4 B	4298	30.3	-	-	42.2	cold first run 51.04 ms
blender/Sintel.2010.1080p.mkv	1.10 GiB	OneMedia	141.69 ms	-	33.2 MiB	705.4 B	49323	1125.2	-	-	42.3	cold first run 282.31 ms
blender/tears_of_steel_1080p.webm	544.9 MiB	OneMedia	76.02 ms	-	33.4 MiB	437.3 B	80000	544.6	-	-	42.1	cold first run 201.70 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	1.40 s	1.40 s – 1.40 s	107.3
blender/Sintel.2010.1080p.mkv	mkvmerge	338.07 ms	338.07 ms – 338.07 ms	95.2	exit 1
blender/tears_of_steel_1080p.webm	ffmpeg -c copy -f matroska	213.15 ms	212.91 ms – 219.89 ms	29.6
blender/tears_of_steel_1080p.webm	mkvmerge	227.89 ms	226.94 ms – 228.59 ms	60.0	exit 1
generated/mkv/h264-aac.mkv	ffmpeg -c copy -f matroska	27.15 ms	26.71 ms – 28.27 ms	18.0
generated/mkv/h264-aac.mkv	mkvmerge	46.00 ms	45.28 ms – 50.26 ms	17.6	exit 1
matroska-test-files/test1.mkv	ffmpeg -c copy -f matroska	58.63 ms	58.57 ms – 60.51 ms	18.7
matroska-test-files/test1.mkv	mkvmerge	59.93 ms	59.52 ms – 60.13 ms	55.7	exit 1
matroska-test-files/test5.mkv	ffmpeg -c copy -f matroska	82.78 ms	81.16 ms – 82.87 ms	35.9
matroska-test-files/test5.mkv	mkvmerge	61.91 ms	61.62 ms – 62.60 ms	70.8	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	30.6 µs	0.49×	35.5 KiB	-	-	-	-	-	42.3	cold first run 29.72 ms
generated/audio-es/tagged/id3v22-basic.mp3	0.0 MiB	ATL.NET	69.8 µs	1.13×	285.6 KiB	-	-	-	-	-	42.2	cold first run 33.69 ms
generated/audio-es/tagged/id3v22-basic.mp3	0.0 MiB	TagLib#	61.9 µs	1.00×	34.1 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 16.73 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	OneMedia	35.9 µs	0.73×	42.5 KiB	-	-	-	-	-	42.1	cold first run 31.03 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	ATL.NET	94.6 µs	1.93×	296.1 KiB	-	-	-	-	-	42.2	cold first run 37.00 ms
generated/audio-es/tagged/id3v23-and-v1.mp3	0.0 MiB	TagLib#	48.9 µs	1.00×	33.0 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 13.80 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	OneMedia	29.7 µs	0.53×	36.0 KiB	-	-	-	-	-	42.2	cold first run 29.86 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	ATL.NET	67.6 µs	1.20×	285.5 KiB	-	-	-	-	-	42.1	cold first run 33.45 ms
generated/audio-es/tagged/id3v24-basic.mp3	0.0 MiB	TagLib#	56.5 µs	1.00×	37.9 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 15.95 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	OneMedia	23.8 µs	0.57×	25.8 KiB	-	-	-	-	-	42.1	cold first run 28.74 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	ATL.NET	45.4 µs	1.09×	274.2 KiB	-	-	-	-	-	42.3	cold first run 30.37 ms
generated/audio-es/tagged/id3v24-chapters.mp3	0.0 MiB	TagLib#	41.7 µs	1.00×	26.3 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 14.19 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	OneMedia	29.1 µs	0.52×	32.1 KiB	-	-	-	-	-	42.1	cold first run 27.93 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	ATL.NET	87.0 µs	1.56×	348.1 KiB	-	-	-	-	-	42.2	cold first run 35.25 ms
generated/audio-es/tagged/apev2-only.mp3	0.0 MiB	TagLib#	55.8 µs	1.00×	30.6 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 15.10 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	OneMedia	42.8 µs	0.64×	52.2 KiB	-	-	-	-	-	42.2	cold first run 31.98 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	ATL.NET	123.6 µs	1.86×	308.9 KiB	-	-	-	-	-	42.2	cold first run 39.61 ms
generated/audio-es/tagged/id3v24-apev2-v1.mp3	0.0 MiB	TagLib#	66.5 µs	1.00×	46.9 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 15.91 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	OneMedia	20.9 µs	0.87×	20.5 KiB	-	-	-	-	-	42.3	cold first run 25.59 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	ATL.NET	43.9 µs	1.84×	334.6 KiB	-	-	-	-	-	42.2	cold first run 28.76 ms
generated/audio-es/mp3/long-60s.mp3	0.9 MiB	TagLib#	23.9 µs	1.00×	14.7 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 11.93 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	72.04 ms	71.52 ms – 73.01 ms	21.5
generated/audio-es/mp3/long-60s.mp3	MediaInfo	21.95 ms	21.74 ms – 22.28 ms	9.3
generated/audio-es/mp3/long-60s.mp3	ffprobe -show_format -show_streams	31.90 ms	30.37 ms – 35.40 ms	13.6
generated/audio-es/tagged/apev2-only.mp3	ExifTool	72.52 ms	72.28 ms – 72.68 ms	21.5
generated/audio-es/tagged/apev2-only.mp3	MediaInfo	24.31 ms	23.86 ms – 24.46 ms	13.9
generated/audio-es/tagged/apev2-only.mp3	ffprobe -show_format -show_streams	31.94 ms	31.18 ms – 32.13 ms	13.4
generated/audio-es/tagged/id3v22-basic.mp3	ExifTool	73.78 ms	72.83 ms – 74.53 ms	21.6
generated/audio-es/tagged/id3v22-basic.mp3	MediaInfo	24.90 ms	23.42 ms – 41.80 ms	13.8
generated/audio-es/tagged/id3v22-basic.mp3	ffprobe -show_format -show_streams	34.74 ms	33.90 ms – 73.71 ms	13.8
generated/audio-es/tagged/id3v23-and-v1.mp3	ExifTool	73.28 ms	71.63 ms – 75.33 ms	21.6
generated/audio-es/tagged/id3v23-and-v1.mp3	MediaInfo	21.71 ms	21.26 ms – 22.05 ms	9.3
generated/audio-es/tagged/id3v23-and-v1.mp3	ffprobe -show_format -show_streams	34.12 ms	34.07 ms – 34.90 ms	13.4
generated/audio-es/tagged/id3v24-apev2-v1.mp3	ExifTool	80.31 ms	79.43 ms – 80.37 ms	24.3
generated/audio-es/tagged/id3v24-apev2-v1.mp3	MediaInfo	23.11 ms	23.10 ms – 24.16 ms	14.0
generated/audio-es/tagged/id3v24-apev2-v1.mp3	ffprobe -show_format -show_streams	34.15 ms	33.90 ms – 34.92 ms	13.4
generated/audio-es/tagged/id3v24-basic.mp3	ExifTool	80.24 ms	79.66 ms – 81.64 ms	24.2
generated/audio-es/tagged/id3v24-basic.mp3	MediaInfo	23.14 ms	22.46 ms – 23.61 ms	13.9
generated/audio-es/tagged/id3v24-basic.mp3	ffprobe -show_format -show_streams	34.19 ms	33.26 ms – 38.87 ms	13.9
generated/audio-es/tagged/id3v24-chapters.mp3	ExifTool	71.81 ms	71.37 ms – 72.80 ms	21.3
generated/audio-es/tagged/id3v24-chapters.mp3	MediaInfo	21.27 ms	21.22 ms – 21.91 ms	9.3
generated/audio-es/tagged/id3v24-chapters.mp3	ffprobe -show_format -show_streams	34.30 ms	34.28 ms – 35.43 ms	13.4

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	20.7 µs	0.77×	9.0 KiB	-	-	-	-	-	42.2	cold first run 24.42 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	ATL.NET	46.0 µs	1.72×	89.3 KiB	-	-	-	-	-	42.2	cold first run 26.71 ms
generated/xiph-flv/flac/tags.flac	0.1 MiB	TagLib#	26.7 µs	1.00×	19.9 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 7.72 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	OneMedia	25.0 µs	0.79×	18.0 KiB	-	-	-	-	-	42.2	cold first run 25.12 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	ATL.NET	47.6 µs	1.50×	90.1 KiB	-	-	-	-	-	42.2	cold first run 27.43 ms
generated/xiph-flv/flac/cover.flac	0.1 MiB	TagLib#	31.7 µs	1.00×	72.8 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 8.86 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	OneMedia	22.5 µs	0.78×	9.4 KiB	-	-	-	-	-	42.2	cold first run 23.60 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	ATL.NET	54.5 µs	1.89×	98.8 KiB	-	-	-	-	-	42.2	cold first run 28.13 ms
generated/xiph-flv/tagvar/flac-rich.flac	0.1 MiB	TagLib#	28.8 µs	1.00×	23.4 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 7.91 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	OneMedia	28.9 µs	0.65×	22.2 KiB	-	-	-	-	-	42.2	cold first run 26.13 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	ATL.NET	52.4 µs	1.17×	168.4 KiB	-	-	-	-	-	42.2	cold first run 28.56 ms
generated/xiph-flv/ogg/vorbis-tags.ogg	0.0 MiB	TagLib#	44.7 µs	1.00×	33.9 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.36 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	OneMedia	30.1 µs	0.64×	22.9 KiB	-	-	-	-	-	42.2	cold first run 25.55 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	ATL.NET	61.8 µs	1.31×	178.0 KiB	-	-	-	-	-	42.1	cold first run 29.23 ms
generated/xiph-flv/tagvar/vorbis-rich.ogg	0.0 MiB	TagLib#	47.1 µs	1.00×	37.5 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.61 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	OneMedia	20.3 µs	0.59×	12.2 KiB	-	-	-	-	-	42.2	cold first run 26.54 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	ATL.NET	69.8 µs	2.04×	162.0 KiB	-	-	-	-	-	42.2	cold first run 28.78 ms
generated/xiph-flv/ogg/opus-tags.opus	0.0 MiB	TagLib#	34.3 µs	1.00×	23.8 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.58 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	OneMedia	18.6 µs	0.61×	7.9 KiB	-	-	-	-	-	42.3	cold first run 25.08 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	ATL.NET	57.3 µs	1.89×	151.5 KiB	-	-	-	-	-	42.3	cold first run 27.87 ms
generated/xiph-flv/tagvar/opus-unicode.opus	0.0 MiB	TagLib#	30.4 µs	1.00×	16.9 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.59 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	OneMedia	41.0 µs	1.13×	26.2 KiB	-	-	-	-	-	42.2	cold first run 25.30 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	ATL.NET	54.6 µs	1.51×	157.5 KiB	-	-	-	-	-	42.1	cold first run 26.25 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	TagLib#	36.2 µs	1.00×	33.5 KiB	-	-	-	-	-	42.3	fastest comparator; cold first run 8.51 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	72.84 ms	72.23 ms – 72.93 ms	21.4
blender/big_buck_bunny_480p_stereo.ogg	MediaInfo	23.39 ms	22.96 ms – 23.53 ms	9.8
blender/big_buck_bunny_480p_stereo.ogg	ffprobe -show_format -show_streams	31.92 ms	31.72 ms – 37.69 ms	17.4
generated/xiph-flv/flac/cover.flac	ExifTool	71.60 ms	71.32 ms – 73.53 ms	21.4
generated/xiph-flv/flac/cover.flac	MediaInfo	23.18 ms	22.97 ms – 24.77 ms	13.9
generated/xiph-flv/flac/cover.flac	ffprobe -show_format -show_streams	31.67 ms	31.39 ms – 33.64 ms	13.5
generated/xiph-flv/flac/tags.flac	ExifTool	72.01 ms	71.40 ms – 72.52 ms	21.2
generated/xiph-flv/flac/tags.flac	MediaInfo	22.26 ms	21.78 ms – 22.26 ms	9.5
generated/xiph-flv/flac/tags.flac	ffprobe -show_format -show_streams	31.45 ms	31.26 ms – 33.74 ms	13.1
generated/xiph-flv/ogg/opus-tags.opus	ExifTool	70.86 ms	70.86 ms – 71.07 ms	21.2
generated/xiph-flv/ogg/opus-tags.opus	MediaInfo	22.84 ms	21.70 ms – 22.93 ms	9.4
generated/xiph-flv/ogg/opus-tags.opus	ffprobe -show_format -show_streams	31.08 ms	30.94 ms – 33.49 ms	13.8
generated/xiph-flv/ogg/vorbis-tags.ogg	ExifTool	71.58 ms	71.47 ms – 72.66 ms	21.4
generated/xiph-flv/ogg/vorbis-tags.ogg	MediaInfo	22.09 ms	21.96 ms – 22.41 ms	9.5
generated/xiph-flv/ogg/vorbis-tags.ogg	ffprobe -show_format -show_streams	31.63 ms	31.60 ms – 35.64 ms	14.5
generated/xiph-flv/tagvar/flac-rich.flac	ExifTool	71.50 ms	70.55 ms – 72.23 ms	21.4
generated/xiph-flv/tagvar/flac-rich.flac	MediaInfo	21.34 ms	21.31 ms – 22.13 ms	9.5
generated/xiph-flv/tagvar/flac-rich.flac	ffprobe -show_format -show_streams	31.80 ms	31.11 ms – 32.23 ms	12.9
generated/xiph-flv/tagvar/opus-unicode.opus	ExifTool	70.83 ms	70.05 ms – 72.24 ms	21.3
generated/xiph-flv/tagvar/opus-unicode.opus	MediaInfo	21.63 ms	21.36 ms – 22.99 ms	9.5
generated/xiph-flv/tagvar/opus-unicode.opus	ffprobe -show_format -show_streams	32.18 ms	32.09 ms – 32.51 ms	13.4
generated/xiph-flv/tagvar/vorbis-rich.ogg	ExifTool	73.83 ms	72.98 ms – 73.86 ms	21.3
generated/xiph-flv/tagvar/vorbis-rich.ogg	MediaInfo	22.08 ms	21.96 ms – 22.45 ms	9.5
generated/xiph-flv/tagvar/vorbis-rich.ogg	ffprobe -show_format -show_streams	31.77 ms	31.60 ms – 32.24 ms	13.7

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	1.31 ms	-	65.5 KiB	1426.7 B	47	0.5	-	-	42.1	cold first run 19.05 ms
generated/xiph-flv/ogg/opus-stereo-64k.opus	0.0 MiB	OneMedia	136.6 µs	-	21.5 KiB	109.7 B	201	0.0	-	-	42.2	cold first run 17.76 ms
generated/xiph-flv/ogg/vorbis-stereo-q5.ogg	0.0 MiB	OneMedia	132.0 µs	-	34.2 KiB	201.1 B	174	0.0	-	-	42.3	cold first run 21.02 ms
generated/xiph-flv/ogg/theora-vorbis.ogv	0.2 MiB	OneMedia	776.0 µs	-	42.1 KiB	146.5 B	294	0.2	-	-	42.2	cold first run 22.45 ms
generated/xiph-flv/flv/h264-aac.flv	0.2 MiB	OneMedia	59.4 µs	-	16.7 KiB	58.0 B	294	0.2	-	-	42.1	cold first run 16.31 ms
generated/xiph-flv/flv/mp3-44k.flv	0.1 MiB	OneMedia	32.1 µs	-	7.1 KiB	46.8 B	155	0.1	-	-	42.2	cold first run 12.55 ms
blender/big_buck_bunny_480p_stereo.ogg	159.1 MiB	OneMedia	479.83 ms	-	731.0 KiB	14.9 B	50290	157.5	-	-	42.2	cold first run 584.85 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	299.55 ms	284.01 ms – 302.44 ms	20.7
generated/xiph-flv/flac/bs4096.flac	ffmpeg -c copy -f null	33.01 ms	32.14 ms – 34.28 ms	13.6
generated/xiph-flv/flv/h264-aac.flv	ffmpeg -c copy -f null	34.11 ms	33.67 ms – 34.58 ms	20.1
generated/xiph-flv/flv/mp3-44k.flv	ffmpeg -c copy -f null	33.03 ms	32.94 ms – 34.43 ms	15.8
generated/xiph-flv/ogg/opus-stereo-64k.opus	ffmpeg -c copy -f null	32.42 ms	31.81 ms – 35.42 ms	13.9
generated/xiph-flv/ogg/theora-vorbis.ogv	ffmpeg -c copy -f null	33.85 ms	32.65 ms – 34.68 ms	16.0
generated/xiph-flv/ogg/vorbis-stereo-q5.ogg	ffmpeg -c copy -f null	32.29 ms	31.97 ms – 33.14 ms	14.2

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	28.5 µs	0.83×	75.3 KiB	-	-	-	-	-	42.1	cold first run 33.14 ms
generated/asf/wmv2-wmav2-tagged.wmv	0.4 MiB	ATL.NET	204.6 µs	5.96×	598.2 KiB	-	-	-	-	-	42.1	cold first run 31.92 ms
generated/asf/wmv2-wmav2-tagged.wmv	0.4 MiB	TagLib#	34.3 µs	1.00×	27.6 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.31 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	OneMedia	28.7 µs	0.72×	66.2 KiB	-	-	-	-	-	42.2	cold first run 32.21 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	ATL.NET	127.0 µs	3.20×	445.0 KiB	-	-	-	-	-	42.1	cold first run 29.35 ms
generated/asf/wmav2-tagged.wma	0.0 MiB	TagLib#	39.7 µs	1.00×	26.1 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 7.58 ms
generated/asf/wmav2-cover.wma	0.1 MiB	OneMedia	21.6 µs	0.58×	70.5 KiB	-	-	-	-	-	42.1	cold first run 32.43 ms
generated/asf/wmav2-cover.wma	0.1 MiB	ATL.NET	104.8 µs	2.82×	424.1 KiB	-	-	-	-	-	42.2	cold first run 30.55 ms
generated/asf/wmav2-cover.wma	0.1 MiB	TagLib#	37.1 µs	1.00×	20.3 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 7.74 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	OneMedia	22.0 µs	0.62×	61.6 KiB	-	-	-	-	-	42.2	cold first run 31.32 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	ATL.NET	106.9 µs	3.03×	424.9 KiB	-	-	-	-	-	42.2	cold first run 28.59 ms
generated/asf/mp3-tagged-unicode.wma	0.1 MiB	TagLib#	35.3 µs	1.00×	18.4 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 7.90 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	OneMedia	35.8 µs	0.67×	82.3 KiB	-	-	-	-	-	42.2	cold first run 32.32 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	ATL.NET	315.6 µs	5.92×	713.1 KiB	-	-	-	-	-	42.2	cold first run 32.99 ms
samples/ASF/wma_with_WmPicture.wma	2.3 MiB	TagLib#	53.3 µs	1.00×	166.0 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.43 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	OneMedia	40.0 µs	0.94×	129.1 KiB	-	-	-	-	-	42.2	cold first run 38.02 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	ATL.NET	291.8 µs	6.85×	813.3 KiB	-	-	-	-	-	42.0	cold first run 30.45 ms
samples/ASF/wma_with_ID3_APIC.wma	2.2 MiB	TagLib#	42.6 µs	1.00×	73.3 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 8.01 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	103.83 ms	103.68 ms – 103.90 ms	37.2
generated/asf/mp3-tagged-unicode.wma	MediaInfo	21.97 ms	21.92 ms – 22.23 ms	9.5
generated/asf/mp3-tagged-unicode.wma	ffprobe -show_format -show_streams	31.44 ms	30.62 ms – 35.57 ms	13.6
generated/asf/wmav2-cover.wma	ExifTool	105.00 ms	104.66 ms – 105.63 ms	37.4
generated/asf/wmav2-cover.wma	MediaInfo	26.02 ms	25.03 ms – 26.08 ms	10.8
generated/asf/wmav2-cover.wma	ffprobe -show_format -show_streams	31.41 ms	31.00 ms – 32.34 ms	14.5
generated/asf/wmav2-tagged.wma	ExifTool	103.80 ms	103.08 ms – 105.02 ms	37.2
generated/asf/wmav2-tagged.wma	MediaInfo	21.78 ms	21.10 ms – 22.98 ms	9.4
generated/asf/wmav2-tagged.wma	ffprobe -show_format -show_streams	31.19 ms	31.19 ms – 35.73 ms	13.8
generated/asf/wmv2-wmav2-tagged.wmv	ExifTool	105.17 ms	104.95 ms – 108.63 ms	37.3
generated/asf/wmv2-wmav2-tagged.wmv	MediaInfo	25.81 ms	25.51 ms – 26.52 ms	10.9
generated/asf/wmv2-wmav2-tagged.wmv	ffprobe -show_format -show_streams	32.31 ms	31.47 ms – 37.56 ms	15.5
samples/ASF/wma_with_ID3_APIC.wma	ExifTool	104.75 ms	104.16 ms – 106.95 ms	37.4
samples/ASF/wma_with_ID3_APIC.wma	MediaInfo	21.48 ms	21.41 ms – 22.67 ms	9.4
samples/ASF/wma_with_ID3_APIC.wma	ffprobe -show_format -show_streams	32.06 ms	31.92 ms – 32.51 ms	14.0
samples/ASF/wma_with_WmPicture.wma	ExifTool	104.87 ms	103.90 ms – 104.95 ms	37.4
samples/ASF/wma_with_WmPicture.wma	MediaInfo	23.56 ms	23.51 ms – 23.68 ms	14.2
samples/ASF/wma_with_WmPicture.wma	ffprobe -show_format -show_streams	31.23 ms	31.05 ms – 32.71 ms	14.5

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	25.2 µs	0.67×	9.7 KiB	-	-	-	-	-	42.1	cold first run 23.10 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	ATL.NET	37.7 µs	1.00×	84.4 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 25.39 ms
generated/pcm/tagged-wav-info.wav	0.5 MiB	TagLib#	65.0 µs	1.72×	30.9 KiB	-	-	-	-	-	42.2	cold first run 15.23 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	OneMedia	28.8 µs	0.47×	13.7 KiB	-	-	-	-	-	42.2	cold first run 24.81 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	ATL.NET	117.6 µs	1.94×	148.9 KiB	-	-	-	-	-	42.4	cold first run 27.69 ms
generated/pcm/tagged-wav-bext.wav	0.8 MiB	TagLib#	60.7 µs	1.00×	31.2 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 14.03 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	OneMedia	25.6 µs	0.59×	9.7 KiB	-	-	-	-	-	42.2	cold first run 23.77 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	ATL.NET	43.5 µs	1.00×	84.4 KiB	-	-	-	-	-	42.3	fastest comparator; cold first run 25.35 ms
generated/pcm/tagged-wav-id3.wav	0.5 MiB	TagLib#	57.3 µs	1.32×	30.9 KiB	-	-	-	-	-	42.0	cold first run 13.99 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	OneMedia	15.6 µs	0.88×	3.6 KiB	-	-	-	-	-	42.2	cold first run 21.53 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	ATL.NET	17.9 µs	1.00×	79.9 KiB	-	-	-	-	-	42.3	fastest comparator; cold first run 22.64 ms
generated/pcm/wav-pcm_s16le-mono44k.wav	0.3 MiB	TagLib#	47.1 µs	2.64×	26.2 KiB	-	-	-	-	-	42.3	cold first run 12.56 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	OneMedia	20.2 µs	0.77×	6.3 KiB	-	-	-	-	-	42.1	cold first run 21.82 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	ATL.NET	32.7 µs	1.24×	78.6 KiB	-	-	-	-	-	42.1	cold first run 24.61 ms
generated/pcm/tagged-aiff.aiff	0.5 MiB	TagLib#	26.3 µs	1.00×	9.4 KiB	-	-	-	-	-	42.2	fastest comparator; cold first run 6.17 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	OneMedia	24.8 µs	0.60×	13.8 KiB	-	-	-	-	-	42.1	cold first run 27.28 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	ATL.NET	66.3 µs	1.60×	224.0 KiB	-	-	-	-	-	42.2	cold first run 32.88 ms
generated/pcm/tagged-aiff-id3.aiff	0.5 MiB	TagLib#	41.4 µs	1.00×	17.8 KiB	-	-	-	-	-	42.1	fastest comparator; cold first run 9.03 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	OneMedia	16.4 µs	0.84×	3.6 KiB	-	-	-	-	-	42.2	cold first run 20.95 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	ATL.NET	27.3 µs	1.40×	75.5 KiB	-	-	-	-	-	42.1	cold first run 21.43 ms
generated/pcm/aiff-pcm_s16be-mono44k.aiff	0.3 MiB	TagLib#	19.5 µs	1.00×	7.3 KiB	-	-	-	-	-	42.3	fastest comparator; cold first run 6.18 ms
generated/pcm/tagged-caf.caf	0.5 MiB	OneMedia	17.8 µs	0.32×	7.2 KiB	-	-	-	-	-	42.2	cold first run 21.93 ms
generated/pcm/tagged-caf.caf	0.5 MiB	ATL.NET	55.2 µs	1.00×	86.0 KiB	-	-	-	-	-	42.2	cold first run 26.45 ms
generated/pcm/tagged-caf.caf	0.5 MiB	TagLib#	fail	-	-	-	-	-	-	-	42.2	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	101.83 ms	100.68 ms – 102.16 ms	36.9
generated/pcm/aiff-pcm_s16be-mono44k.aiff	MediaInfo	22.74 ms	22.42 ms – 22.82 ms	9.4
generated/pcm/aiff-pcm_s16be-mono44k.aiff	ffprobe -show_format -show_streams	30.67 ms	30.54 ms – 32.24 ms	13.0
generated/pcm/tagged-aiff-id3.aiff	ExifTool	109.73 ms	108.30 ms – 110.41 ms	38.1
generated/pcm/tagged-aiff-id3.aiff	MediaInfo	23.56 ms	22.82 ms – 25.09 ms	9.5
generated/pcm/tagged-aiff-id3.aiff	ffprobe -show_format -show_streams	30.47 ms	30.21 ms – 32.06 ms	13.0
generated/pcm/tagged-aiff.aiff	ExifTool	103.01 ms	101.69 ms – 104.46 ms	37.0
generated/pcm/tagged-aiff.aiff	MediaInfo	23.98 ms	23.40 ms – 24.12 ms	9.3
generated/pcm/tagged-aiff.aiff	ffprobe -show_format -show_streams	31.76 ms	30.51 ms – 32.20 ms	13.0
generated/pcm/tagged-caf.caf	ExifTool	76.93 ms	76.62 ms – 77.58 ms	22.7	exit 1
generated/pcm/tagged-caf.caf	MediaInfo	21.61 ms	21.17 ms – 21.85 ms	9.2
generated/pcm/tagged-caf.caf	ffprobe -show_format -show_streams	31.72 ms	30.64 ms – 32.30 ms	13.0
generated/pcm/tagged-wav-bext.wav	ExifTool	71.31 ms	71.19 ms – 71.44 ms	21.4
generated/pcm/tagged-wav-bext.wav	MediaInfo	34.68 ms	34.30 ms – 34.79 ms	11.3
generated/pcm/tagged-wav-bext.wav	ffprobe -show_format -show_streams	31.65 ms	30.98 ms – 31.99 ms	13.7
generated/pcm/tagged-wav-id3.wav	ExifTool	72.93 ms	70.32 ms – 73.41 ms	21.4
generated/pcm/tagged-wav-id3.wav	MediaInfo	23.44 ms	23.32 ms – 24.68 ms	9.6
generated/pcm/tagged-wav-id3.wav	ffprobe -show_format -show_streams	49.43 ms	49.32 ms – 50.24 ms	13.9
generated/pcm/tagged-wav-info.wav	ExifTool	71.39 ms	70.88 ms – 71.50 ms	21.2
generated/pcm/tagged-wav-info.wav	MediaInfo	23.75 ms	23.44 ms – 24.43 ms	9.6
generated/pcm/tagged-wav-info.wav	ffprobe -show_format -show_streams	50.09 ms	49.36 ms – 50.12 ms	13.9
generated/pcm/wav-pcm_s16le-mono44k.wav	ExifTool	70.30 ms	69.21 ms – 71.13 ms	21.1
generated/pcm/wav-pcm_s16le-mono44k.wav	MediaInfo	23.36 ms	23.18 ms – 23.63 ms	9.5
generated/pcm/wav-pcm_s16le-mono44k.wav	ffprobe -show_format -show_streams	41.19 ms	41.10 ms – 41.70 ms	13.6

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	55.6 µs	-	22.9 KiB	108.6 B	216	0.4	-	-	42.2	cold first run 23.94 ms
samples/avi/AV36_1.AVI	9.3 MiB	OneMedia	581.4 µs	-	22.8 KiB	23.6 B	988	8.8	-	-	42.2	cold first run 25.66 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	3.98 ms	-	22.4 KiB	2.5 B	9147	44.5	-	-	42.2	cold first run 30.69 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	OneMedia	15.10 ms	-	19.3 KiB	6.6 B	2984	179.9	-	-	42.2	cold first run 39.99 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/tagged-mpeg4-mp3.avi	ffmpeg -c copy -f null	32.35 ms	32.29 ms – 36.53 ms	14.7
samples/avi/AV36_1.AVI	ffmpeg -c copy -f null	35.91 ms	35.03 ms – 36.97 ms	14.3
samples/avi/DV-type1/dvformat2.avi	ffmpeg -c copy -f null	56.94 ms	56.81 ms – 58.17 ms	14.8
samples/avi/GoneNutty.avi	ffmpeg -c copy -f null	65.15 ms	64.28 ms – 66.04 ms	16.8

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	110.2 µs	-	1.1 MiB	561425.8 B	2	0.2	-	-	42.3	cold first run 22.46 ms
matroska-test-files/test1.mkv	22.3 MiB	OneMedia	8.19 ms	-	63.6 MiB	33320792.0 B	2	22.3	-	-	42.1	cold first run 29.90 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	OneMedia	246.6 µs	-	1.0 MiB	550282.0 B	2	0.4	-	-	42.2	cold first run 12.95 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	23.14 ms	-	129.3 MiB	67800584.0 B	2	44.7	-	-	42.1	cold first run 42.71 ms
generated/mp4/h264-aac.mp4	0.2 MiB	OneMedia	103.1 µs	-	1.1 MiB	551751.3 B	2	0.2	-	-	42.2	cold first run 14.46 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	8.60 ms	-	63.2 MiB	11047368.0 B	6	26.6	-	-	42.2	cold first run 27.15 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	1.55 ms	-	740.5 KiB	379142.1 B	2	0.2	-	-	42.2	cold first run 72.82 ms
samples/MPEG-4/video.mp4	26.6 MiB	OneMedia	15.46 ms	-	4.1 MiB	81713.2 B	52	25.8	-	-	42.1	cold first run 115.00 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	24.1 µs	0.69×	22.9 KiB	-	-	-	2	-	42.2	cold first run 18.64 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.3	NullReferenceException: Object reference not set to an instance of an object.
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	MetadataExtractor	35.2 µs	1.00×	67.9 KiB	-	-	-	11	-	42.3	fastest comparator; cold first run 10.68 ms
generated/avi/tagged-mpeg4-mp3.avi	0.4 MiB	TagLib#	70.1 µs	2.00×	77.6 KiB	-	-	-	2	-	42.3	cold first run 15.21 ms
samples/avi/AV36_1.AVI	9.3 MiB	OneMedia	19.0 µs	0.57×	22.8 KiB	-	-	-	2	-	42.2	cold first run 18.68 ms
samples/avi/AV36_1.AVI	9.3 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.2	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/AV36_1.AVI	9.3 MiB	MetadataExtractor	33.5 µs	1.00×	67.8 KiB	-	-	-	11	-	42.2	fastest comparator; cold first run 8.30 ms
samples/avi/AV36_1.AVI	9.3 MiB	TagLib#	58.9 µs	1.76×	40.6 KiB	-	-	-	2	-	42.3	cold first run 14.31 ms
samples/avi/GoneNutty.avi	44.7 MiB	OneMedia	18.0 µs	0.54×	22.4 KiB	-	-	-	2	-	42.3	cold first run 18.42 ms
samples/avi/GoneNutty.avi	44.7 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.2	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/GoneNutty.avi	44.7 MiB	MetadataExtractor	33.4 µs	1.00×	67.8 KiB	-	-	-	11	-	42.2	fastest comparator; cold first run 8.24 ms
samples/avi/GoneNutty.avi	44.7 MiB	TagLib#	59.1 µs	1.77×	39.3 KiB	-	-	-	2	-	42.2	cold first run 13.92 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	OneMedia	19.1 µs	0.51×	19.1 KiB	-	-	-	2	-	42.1	cold first run 18.27 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	ATL.NET	fail	-	-	-	-	-	-	-	42.2	NullReferenceException: Object reference not set to an instance of an object.
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	MetadataExtractor	37.3 µs	1.00×	68.4 KiB	-	-	-	11	-	42.1	fastest comparator; cold first run 8.58 ms
samples/avi/DV-type1/dvformat2.avi	180.0 MiB	TagLib#	58.9 µs	1.58×	291.4 KiB	-	-	-	2	-	42.1	cold first run 14.28 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/tagged-mpeg4-mp3.avi	ExifTool	73.38 ms	73.17 ms – 74.24 ms	21.6
generated/avi/tagged-mpeg4-mp3.avi	MediaInfo	26.40 ms	25.85 ms – 26.48 ms	11.4
generated/avi/tagged-mpeg4-mp3.avi	ffprobe -show_format -show_streams	30.92 ms	30.37 ms – 33.38 ms	14.3
samples/avi/AV36_1.AVI	ExifTool	72.93 ms	71.15 ms – 73.56 ms	21.4
samples/avi/AV36_1.AVI	MediaInfo	23.70 ms	23.64 ms – 24.21 ms	10.2
samples/avi/AV36_1.AVI	ffprobe -show_format -show_streams	31.71 ms	31.18 ms – 32.87 ms	13.5
samples/avi/DV-type1/dvformat2.avi	ExifTool	73.14 ms	73.11 ms – 73.49 ms	21.4
samples/avi/DV-type1/dvformat2.avi	MediaInfo	38.18 ms	37.72 ms – 38.63 ms	11.9
samples/avi/DV-type1/dvformat2.avi	ffprobe -show_format -show_streams	35.39 ms	34.46 ms – 38.28 ms	14.4
samples/avi/GoneNutty.avi	ExifTool	73.14 ms	72.73 ms – 73.51 ms	21.5
samples/avi/GoneNutty.avi	MediaInfo	41.09 ms	40.58 ms – 41.45 ms	12.3
samples/avi/GoneNutty.avi	ffprobe -show_format -show_streams	32.51 ms	31.94 ms – 33.48 ms	15.2

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

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

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