Decompression of quality 6 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	2.568×
Rust brotli	0.569×
Burli	2.545×

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

Decompression by dataset at source quality 6

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.

50,823 compressed → 1,048,576 restored bytes; compressed / original: 4.847%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	687.5	678.8–695.7	1,454.59	1.000×
mbrotli	267.9	267.6–268.2	3,732.56	2.566×
Rust brotli	837.5	836.7–838.5	1,194.01	0.821×
Burli	355.3	354.9–355.6	2,814.86	1.935×

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	2.165	2.164–2.166	28,866.35	1.000×
mbrotli	0.8424	0.8417–0.8431	74,194.16	2.570×
Rust brotli	35.88	35.83–35.93	1,741.82	0.060×
Burli	0.8536	0.8532–0.854	73,220.64	2.537×

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	39.99–40.09	24,976.27	1.000×
mbrotli	15.69	15.67–15.7	63,744.07	2.552×
Rust brotli	92.17	92.08–92.26	10,849.92	0.434×
Burli	15.68	15.67–15.69	63,767.51	2.553×

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	34.67	34.65–34.69	1,802.66	1.000×
mbrotli	8.751	8.748–8.756	7,141.74	3.962×
Rust brotli	46.42	46.36–46.49	1,346.29	0.747×
Burli	8.44	8.417–8.462	7,405.27	4.108×

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	1,228	1,226–1,229	814.58	1.000×
mbrotli	8.458	8.45–8.469	118,232.82	145.146×
Rust brotli	1,268	1,266–1,269	788.88	0.968×
Burli	8.054	8.047–8.061	124,165.77	152.430×

alice29

Vendored Alice in Wonderland text.

51,967 compressed → 152,089 restored bytes; compressed / original: 34.169%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	202.4	201.9–203	716.48	1.000×
mbrotli	220.8	220.6–221	656.86	0.917×
Rust brotli	287.6	287.3–287.9	504.35	0.704×
Burli	281.1	280.9–281.3	515.95	0.720×

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	0.1037	0.1036–0.1038	—	1.000×
mbrotli	0.02023	0.01954–0.02095	—	5.126×
Rust brotli	1.735	1.734–1.737	—	0.060×
Burli	0.01543	0.01539–0.01551	—	6.720×

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	0.6916	0.6911–0.6923	60.67	1.000×
mbrotli	0.8731	0.8722–0.8741	48.06	0.792×
Rust brotli	3.436	3.433–3.441	12.21	0.201×
Burli	0.5861	0.5846–0.5873	71.60	1.180×

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