Decompression of quality 7 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	2.574×
Rust brotli	0.562×
Burli	2.511×

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

Decompression by dataset at source quality 7

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.

50,580 compressed → 1,048,576 restored bytes; compressed / original: 4.824%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	691.9	674.7–709.8	1,445.28	1.000×
mbrotli	268.7	268.3–269	3,722.26	2.575×
Rust brotli	838.5	837.9–839.2	1,192.54	0.825×
Burli	367	366.5–367.4	2,725.06	1.885×

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	2.17	2.168–2.171	28,804.19	1.000×
mbrotli	0.8435	0.8426–0.8444	74,096.58	2.572×
Rust brotli	35.44	35.42–35.47	1,763.36	0.061×
Burli	0.8651	0.8648–0.8654	72,248.23	2.508×

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	40.24	40.17–40.32	24,853.21	1.000×
mbrotli	16.04	16.02–16.06	62,348.51	2.509×
Rust brotli	94.53	94.41–94.63	10,578.93	0.426×
Burli	16.01	16–16.02	62,459.59	2.513×

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	34.73	34.71–34.75	1,799.59	1.000×
mbrotli	8.756	8.751–8.761	7,137.99	3.966×
Rust brotli	46.44	46.38–46.51	1,345.73	0.748×
Burli	8.453	8.437–8.47	7,394.00	4.109×

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	1,227	1,226–1,229	814.87	1.000×
mbrotli	8.486	8.476–8.497	117,840.80	144.613×
Rust brotli	1,263	1,262–1,264	791.84	0.972×
Burli	8.047	8.044–8.051	124,265.58	152.498×

alice29

Vendored Alice in Wonderland text.

51,451 compressed → 152,089 restored bytes; compressed / original: 33.830%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	198.4	197.9–199	731.03	1.000×
mbrotli	214.6	214.4–214.9	675.81	0.924×
Rust brotli	283.9	283.7–284.1	510.84	0.699×
Burli	278.2	277.9–278.5	521.41	0.713×

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	0.1127	0.1126–0.1128	—	1.000×
mbrotli	0.02022	0.01954–0.02093	—	5.573×
Rust brotli	1.736	1.734–1.738	—	0.065×
Burli	0.01544	0.01539–0.01552	—	7.300×

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	0.695	0.6942–0.6958	60.38	1.000×
mbrotli	0.8747	0.8736–0.8759	47.97	0.795×
Rust brotli	3.435	3.43–3.44	12.22	0.202×
Burli	0.5848	0.5838–0.5857	71.75	1.188×

Keyboard shortcuts

mbrotli