1.5 KiB
1.5 KiB
FasterBase64
An implementation of a fast base64 encoding algorithm in C#. The algorithm is described in Faster Base64 Encoding and Decoding Using AVX2 Instructions by Wojciech Muła and Daniel Lemire.
Benchmarks show that this implementation is about 8-10 times faster
than the standard .NET implementation
in System.Convert.TryToBase64Chars() and System.Convert.TryFromBase64Chars().
We provide re-implementations of these two methods
within a static class FasterBase64.Convert.
FasterBase64.Convert.TryToBase64Chars()works the same way asSystem.Convert.TryToBase64Chars();System.FasterBase64.TryFromBase64Chars()works the same way asSystem.Convert.TryFromBase64Chars(), if the input does not contain whitespace. The standard .NET implementation differs from the RFC4648 standard in that it allows whitespace in the data. If you need an implementation that skips whitespace, it is easy to copy the data, omitting whitespace, and then callSystem.FasterBase64.TryFromBase64Chars(). We believe that (in all reasonable cases) this is still faster than using the standard implementation.
Caveats:
- Although we believe the implementation to be reasonably well tested, there might still be bugs.
- The implementation uses AVX2 instructions, but does not check if AVX2
is available. AVX2 support can be easily checked by querying the property
System.Runtime.Intrinsics.X86.Avx2.IsSupported.
TODO:
- NuGet package.
License:
- Copyright (c) Alexander Luzgarev, 2021, under the GPL license.