Decompression of quality 5 streams

Recorded run: dec-2026-10-30-amd (2026-10-30). CSV · Environment · Methodology and limits.

Quality belongs to the C encoder that prepared the input; decoders have no quality setting. All four decode the same bytes. Burli is included at every source quality; SIMD Brotli re-exports Rust brotli’s decoder and is omitted.

Median speed across 8 datasets

Median of per-dataset C mean time / decoder mean time ratios, with equal weight. Higher is faster; 1× matches C. No confidence interval is inferred for this across-dataset median.

Decoder	Median speed / C
Google C	1.000×
mbrotli	2.572×
Rust brotli	0.574×
Burli	2.555×

mbrotli median speed / Burli: 0.982× (direct per-dataset ratios).

Decompression by dataset at source quality 5

Datasets are ranked by mbrotli speed relative to the fastest peer, highest first. Throughput counts restored bytes; empty input has latency only. Whiskers and intervals describe sampling uncertainty, not all host variation. Cold APIs include allocation and disposal. C knows the output capacity; Rust brotli includes its 4 KiB I/O adapter.

text-1m

Alice text repeated cyclically to 1 MiB.

51,228 compressed → 1,048,576 restored bytes; compressed / original: 4.885%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	668.6	662.3–675.6	1,495.77	1.000×
mbrotli	272.5	272.2–272.8	3,669.63	2.453×
Rust brotli	841.7	840.9–842.8	1,188.01	0.794×
Burli	358.6	358.4–359	2,788.30	1.864×

random-64k

64 KiB prefix of the deterministic pseudorandom corpus.

65,540 compressed → 65,536 restored bytes; compressed / original: 100.006%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	2.176	2.175–2.177	28,723.63	1.000×
mbrotli	0.836	0.8352–0.8368	74,764.92	2.603×
Rust brotli	35.81	35.79–35.83	1,745.40	0.061×
Burli	0.8477	0.8471–0.8484	73,728.71	2.567×

random-1m

1 MiB of deterministic xorshift64 pseudorandom bytes.

1,048,581 compressed → 1,048,576 restored bytes; compressed / original: 100.000%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	40.04	40.01–40.06	24,977.09	1.000×
mbrotli	15.76	15.74–15.78	63,450.30	2.540×
Rust brotli	91.21	91.15–91.29	10,963.55	0.439×
Burli	15.74	15.72–15.75	63,542.42	2.544×

binary-64k

64 KiB of structured binary bytes: ((i / 16) XOR i) modulo 256.

1,588 compressed → 65,536 restored bytes; compressed / original: 2.423%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	34.79	34.75–34.84	1,796.64	1.000×
mbrotli	8.717	8.708–8.728	7,170.03	3.991×
Rust brotli	47.94	47.87–48.03	1,303.80	0.726×
Burli	8.408	8.401–8.417	7,433.37	4.137×

repeated-1m

1 MiB of repeated a bytes.

13 compressed → 1,048,576 restored bytes; compressed / original: 0.001%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	1,225	1,224–1,225	816.53	1.000×
mbrotli	8.556	8.542–8.573	116,872.96	143.133×
Rust brotli	1,257	1,256–1,258	795.38	0.974×
Burli	8.209	8.205–8.212	121,824.59	149.197×

alice29

Vendored Alice in Wonderland text.

52,809 compressed → 152,089 restored bytes; compressed / original: 34.722%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	207.7	207.4–208	698.21	1.000×
mbrotli	225.6	225.3–225.8	643.06	0.921×
Rust brotli	293	292.8–293.2	495.00	0.709×
Burli	284.2	283.9–284.6	510.30	0.731×

empty

Empty input; measures API overhead.

1 compressed → 0 restored bytes; compressed / original: undefined.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	0.104	0.1038–0.1042	—	1.000×
mbrotli	0.02027	0.01958–0.02102	—	5.129×
Rust brotli	1.727	1.725–1.729	—	0.060×
Burli	0.01542	0.01538–0.0155	—	6.744×

tiny-text

44-byte quick-brown-fox sentence.

48 compressed → 44 restored bytes; compressed / original: 109.091%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	0.7005	0.7–0.7011	59.90	1.000×
mbrotli	0.8751	0.8744–0.8758	47.95	0.801×
Rust brotli	3.432	3.429–3.435	12.23	0.204×
Burli	0.5891	0.5875–0.5907	71.23	1.189×

Keyboard shortcuts

mbrotli