https://github.com/mcy/vb64

SIMD base64 codecs
https://github.com/mcy/vb64

Last synced: about 1 month ago
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SIMD base64 codecs

• Host: GitHub
• URL: https://github.com/mcy/vb64
• Owner: mcy
• License: apache-2.0
• Created: 2023-11-03T01:18:50.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2024-02-08T21:13:49.000Z (12 months ago)
• Last Synced: 2024-12-10T04:31:48.470Z (about 2 months ago)
• Language: Rust
• Size: 711 KB
• Stars: 76
• Watchers: 3
• Forks: 3
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# 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`](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