Decompression of quality 11 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	2.847×
Rust brotli	0.584×
Burli	2.662×

mbrotli median speed / Burli: 1.067× (direct per-dataset ratios).

Decompression by dataset at source quality 11

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	0.1959	0.1952–0.1968	214.18	1.000×
mbrotli	0.02331	0.02255–0.0241	1,800.10	8.405×
Rust brotli	1.853	1.852–1.855	22.64	0.106×
Burli	0.03506	0.03493–0.03521	1,196.79	5.588×

text-1m

Alice text repeated cyclically to 1 MiB.

46,491 compressed → 1,048,576 restored bytes; compressed / original: 4.434%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	665.7	662.9–669	1,502.22	1.000×
mbrotli	273	272.6–273.6	3,663.14	2.438×
Rust brotli	850.5	849.8–851.1	1,175.84	0.783×
Burli	385.3	384.9–385.6	2,595.33	1.728×

binary-64k

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

1,065 compressed → 65,536 restored bytes; compressed / original: 1.625%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	37.84	37.81–37.87	1,651.78	1.000×
mbrotli	12.18	12.18–12.19	5,129.38	3.105×
Rust brotli	51.38	51.34–51.42	1,216.37	0.736×
Burli	13.7	13.69–13.71	4,562.06	2.762×

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	2.207	2.206–2.208	28,319.23	1.000×
mbrotli	0.8525	0.8521–0.8529	73,314.54	2.589×
Rust brotli	35.64	35.48–35.89	1,753.46	0.062×
Burli	0.8611	0.8607–0.8614	72,584.43	2.563×

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	40.17	40.14–40.22	24,895.16	1.000×
mbrotli	16.03	16–16.06	62,396.03	2.506×
Rust brotli	92.35	92.2–92.52	10,828.28	0.435×
Burli	16	15.99–16.01	62,489.75	2.510×

alice29

Vendored Alice in Wonderland text.

46,487 compressed → 152,089 restored bytes; compressed / original: 30.566%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	239.2	238.5–239.9	606.35	1.000×
mbrotli	248.2	247.8–248.5	584.49	0.964×
Rust brotli	326.5	326.3–326.9	444.17	0.733×
Burli	367.9	367.5–368.3	394.25	0.650×

repeated-1m

1 MiB of repeated a bytes.

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

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	1,226	1,225–1,227	815.69	1.000×
mbrotli	8.947	8.936–8.958	111,771.06	137.027×
Rust brotli	1,263	1,262–1,265	791.61	0.970×
Burli	8.043	8.035–8.053	124,330.40	152.424×

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	0.1133	0.1131–0.1135	—	1.000×
mbrotli	0.02026	0.01958–0.02098	—	5.589×
Rust brotli	1.712	1.71–1.715	—	0.066×
Burli	0.01544	0.01539–0.01551	—	7.337×

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