Decompression of quality 3 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	2.548×
Rust brotli	0.563×
Burli	2.536×

mbrotli median speed / Burli: 0.986× (direct per-dataset ratios).

Decompression by dataset at source quality 3

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.

56,879 compressed → 1,048,576 restored bytes; compressed / original: 5.424%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	647.6	646.9–648.3	1,544.18	1.000×
mbrotli	262.3	262.1–262.5	3,812.97	2.469×
Rust brotli	863.3	862.5–864.1	1,158.39	0.750×
Burli	299.7	299.5–299.9	3,337.01	2.161×

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	2.209–2.211	28,277.40	1.000×
mbrotli	0.8434	0.8426–0.8443	74,108.59	2.621×
Rust brotli	35.9	35.87–35.93	1,740.85	0.062×
Burli	0.8529	0.8524–0.8535	73,276.48	2.591×

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	39.6	39.56–39.64	25,253.03	1.000×
mbrotli	15.99	15.98–16.01	62,531.82	2.476×
Rust brotli	84.31	84.1–84.55	11,861.19	0.470×
Burli	15.97	15.96–15.98	62,627.60	2.480×

binary-64k

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

2,687 compressed → 65,536 restored bytes; compressed / original: 4.100%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	34.52	34.5–34.55	1,810.61	1.000×
mbrotli	8.315	8.308–8.324	7,516.37	4.151×
Rust brotli	46.2	46.14–46.28	1,352.70	0.747×
Burli	8.102	8.098–8.107	7,713.85	4.260×

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	1,225	1,225–1,226	816.09	1.000×
mbrotli	8.547	8.538–8.556	117,004.43	143.372×
Rust brotli	1,258	1,256–1,259	795.08	0.974×
Burli	8.199	8.189–8.209	121,971.40	149.459×

alice29

Vendored Alice in Wonderland text.

56,863 compressed → 152,089 restored bytes; compressed / original: 37.388%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	233.2	233–233.5	621.85	1.000×
mbrotli	243.9	243.8–244.1	594.63	0.956×
Rust brotli	355.8	355.6–356.1	407.66	0.656×
Burli	278.5	278.3–278.6	520.85	0.838×

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	0.1098	0.1096–0.11	—	1.000×
mbrotli	0.02032	0.01965–0.02106	—	5.402×
Rust brotli	1.73	1.726–1.735	—	0.063×
Burli	0.01543	0.01538–0.0155	—	7.116×

tiny-text

44-byte quick-brown-fox sentence.

46 compressed → 44 restored bytes; compressed / original: 104.545%.

Decoder	Mean µs	95% mean interval µs	Decoded MiB/s	Speed / C
Google C	0.7607	0.7597–0.7621	55.16	1.000×
mbrotli	0.7369	0.7351–0.7383	56.95	1.032×
Rust brotli	3.463	3.46–3.466	12.12	0.220×
Burli	0.5204	0.5172–0.523	80.64	1.462×

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