Decompression of quality 0 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	3.059×
Rust brotli	0.446×
Burli	2.873×

mbrotli median speed / Burli: 1.036× (direct per-dataset ratios).

Decompression by dataset at source quality 0

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.

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	0.1545	0.1541–0.1551	271.55	1.000×
mbrotli	0.02264	0.02181–0.02347	1,853.82	6.827×
Rust brotli	1.811	1.81–1.812	23.17	0.085×
Burli	0.03467	0.03448–0.03489	1,210.16	4.456×

binary-64k

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

3,369 compressed → 65,536 restored bytes; compressed / original: 5.141%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	35.85	35.83–35.88	1,743.21	1.000×
mbrotli	10.11	10.1–10.12	6,180.74	3.546×
Rust brotli	78.78	78.73–78.82	793.37	0.455×
Burli	11.17	11.16–11.18	5,595.61	3.210×

repeated-1m

1 MiB of repeated a bytes.

712 compressed → 1,048,576 restored bytes; compressed / original: 0.068%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	206.2	206–206.5	4,848.70	1.000×
mbrotli	45.56	45.53–45.59	21,949.93	4.527×
Rust brotli	230.7	230.2–231.3	4,334.88	0.894×
Burli	46.66	46.6–46.72	21,432.98	4.420×

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	2.168	2.167–2.17	28,826.64	1.000×
mbrotli	0.8428	0.842–0.8436	74,159.30	2.573×
Rust brotli	35.89	35.86–35.93	1,741.37	0.060×
Burli	0.8548	0.8541–0.8556	73,117.62	2.536×

text-1m

Alice text repeated cyclically to 1 MiB.

190,491 compressed → 1,048,576 restored bytes; compressed / original: 18.167%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	902.8	902.1–903.7	1,107.64	1.000×
mbrotli	895	894–896	1,117.37	1.009×
Rust brotli	1,215	1,214–1,216	823.17	0.743×
Burli	938.5	938–939.1	1,065.51	0.962×

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	39.92	39.9–39.95	25,048.14	1.000×
mbrotli	15.97	15.95–15.99	62,628.72	2.500×
Rust brotli	91.51	91.22–91.85	10,927.83	0.436×
Burli	15.99	15.97–16	62,555.46	2.497×

alice29

Vendored Alice in Wonderland text.

65,795 compressed → 152,089 restored bytes; compressed / original: 43.261%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	289.9	289.6–290.2	500.37	1.000×
mbrotli	304.4	304.2–304.5	476.56	0.952×
Rust brotli	426.8	426.3–427.5	339.82	0.679×
Burli	330.1	329.8–330.3	439.44	0.878×

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	0.101	0.1008–0.1011	—	1.000×
mbrotli	0.02024	0.01956–0.02094	—	4.989×
Rust brotli	1.742	1.74–1.745	—	0.058×
Burli	0.01543	0.01538–0.01552	—	6.545×

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