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.
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