63 lines
2.1 KiB
Markdown
63 lines
2.1 KiB
Markdown
blake3
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------
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[](https://godoc.org/lukechampine.com/blake3)
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[](https://goreportcard.com/report/lukechampine.com/blake3)
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```
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go get lukechampine.com/blake3
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```
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`blake3` implements the [BLAKE3 cryptographic hash function](https://github.com/BLAKE3-team/BLAKE3).
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This implementation aims to be performant without sacrificing (too much)
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readability, in the hopes of eventually landing in `x/crypto`.
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In addition to the pure-Go implementation, this package also contains AVX-512
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and AVX2 routines (generated by [`avo`](https://github.com/mmcloughlin/avo))
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that greatly increase performance for large inputs and outputs.
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## Benchmarks
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Tested on a 2020 MacBook Air (i5-7600K @ 3.80GHz). Benchmarks will improve as
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soon as I get access to a beefier AVX-512 machine. :wink:
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### AVX-512
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```
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BenchmarkSum256/64 120 ns/op 533.00 MB/s
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BenchmarkSum256/1024 2229 ns/op 459.36 MB/s
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BenchmarkSum256/65536 16245 ns/op 4034.11 MB/s
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BenchmarkWrite 245 ns/op 4177.38 MB/s
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BenchmarkXOF 246 ns/op 4159.30 MB/s
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```
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### AVX2
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```
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BenchmarkSum256/64 120 ns/op 533.00 MB/s
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BenchmarkSum256/1024 2229 ns/op 459.36 MB/s
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BenchmarkSum256/65536 31137 ns/op 2104.76 MB/s
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BenchmarkWrite 487 ns/op 2103.12 MB/s
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BenchmarkXOF 329 ns/op 3111.27 MB/s
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```
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### Pure Go
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```
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BenchmarkSum256/64 120 ns/op 533.00 MB/s
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BenchmarkSum256/1024 2229 ns/op 459.36 MB/s
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BenchmarkSum256/65536 133505 ns/op 490.89 MB/s
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BenchmarkWrite 2022 ns/op 506.36 MB/s
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BenchmarkXOF 1914 ns/op 534.98 MB/s
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```
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## Shortcomings
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There is no assembly routine for single-block compressions. This is most
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noticeable for ~1KB inputs.
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Each assembly routine inlines all 7 rounds, causing thousands of lines of
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duplicated code. Ideally the routines could be merged such that only a single
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routine is generated for AVX-512 and AVX2, without sacrificing too much
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performance.
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