Decompression of quality 8 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	2.547×
Rust brotli	0.572×
Burli	2.533×

mbrotli median speed / Burli: 0.988× (direct per-dataset ratios).

Decompression by dataset at source quality 8

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.

50,473 compressed → 1,048,576 restored bytes; compressed / original: 4.813%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	647.9	646.8–649.5	1,543.52	1.000×
mbrotli	268.7	268.4–269	3,721.35	2.411×
Rust brotli	838.8	838–840	1,192.11	0.772×
Burli	364.5	364.2–364.9	2,743.19	1.777×

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	2.21	2.208–2.212	28,276.44	1.000×
mbrotli	0.8597	0.8591–0.8603	72,700.10	2.571×
Rust brotli	35.45	35.43–35.48	1,762.84	0.062×
Burli	0.867	0.8666–0.8676	72,085.13	2.549×

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	40.01	39.98–40.06	24,991.58	1.000×
mbrotli	15.87	15.84–15.89	63,031.53	2.522×
Rust brotli	92.48	92.24–92.72	10,813.62	0.433×
Burli	15.9	15.89–15.92	62,876.70	2.516×

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	34.68	34.62–34.79	1,802.12	1.000×
mbrotli	8.659	8.655–8.662	7,218.30	4.005×
Rust brotli	46.86	46.83–46.89	1,333.68	0.740×
Burli	8.427	8.4–8.455	7,416.64	4.116×

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	1,225–1,229	815.20	1.000×
mbrotli	8.461	8.453–8.47	118,187.86	144.980×
Rust brotli	1,270	1,268–1,273	787.34	0.966×
Burli	8.071	8.067–8.075	123,898.16	151.984×

alice29

Vendored Alice in Wonderland text.

51,187 compressed → 152,089 restored bytes; compressed / original: 33.656%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	200.7	200.5–200.9	722.57	1.000×
mbrotli	233.4	233.2–233.6	621.53	0.860×
Rust brotli	282.4	281.9–282.8	513.70	0.711×
Burli	286.7	286.4–287.1	505.88	0.700×

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	0.11	0.1098–0.1102	—	1.000×
mbrotli	0.02027	0.0196–0.02098	—	5.426×
Rust brotli	1.711	1.709–1.713	—	0.064×
Burli	0.01543	0.01538–0.01551	—	7.130×

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	0.6926	0.6921–0.6931	60.59	1.000×
mbrotli	0.9057	0.9049–0.9066	46.33	0.765×
Rust brotli	3.54	3.536–3.543	11.85	0.196×
Burli	0.5869	0.5854–0.5883	71.49	1.180×

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