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SIMD base64 codecs

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최종 버전 다운로드 (.zip)

- bench.rs
- graph-old.png
- graph.png
- graph.png.base64
- lib.rs
- simd.rs
- test_vectors.txt
- util.rs
.gitignore
Cargo.toml
LICENSE.md
README.md
rust-toolchain.toml
rustfmt.toml

// repository documentation

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# vb64

Fast, SIMD base64 codecs.

This crate implements base64 encoding and decoding as fast as possible.
To get maximum performance, compile with `-Ctarget-cpu=native` and
`-Zbuild-std`, which will ensure ideal instruction selection.

The following is a perf comparison with the `base64` crate on a Zen 2
machine using AVX2 instructions; lower is better.

![perf comparison with `base64`](https://raw.githubusercontent.com/mcy/vb64/main/images/graph.png)

On a Zen 2 machine and compiling with AVX2 support, decoding is between
2x to 2.5x faster than `base64`, while encoding is around 1.2x to 1.5x
faster; with only SSSE3, decoding performance is even with `base64` and
encoding is much worse.

It is relatively unlikely that base64 decoding is such a massive bottleneck
for your application that this matters, unless you're parsing base64 blobs
embedded in JSON; you may want to consider using a binary format like
Protobuf instead.

Also this crate uses `std::simd` so it requires nightly.

License: Apache-2.0

vb64

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