Parsing IP addresses in C# at crazy speeds
Summary
The post demonstrates a SIMD-based optimization for parsing IPv4 addresses in C# using AVX-512, comparing against the standard IPAddress.TryParse. It discusses using masked loads to handle ASCII digits in a 16-byte register, UTF-16 encoding in .NET, and guarded code paths when AVX-512 isn’t available. Benchmarks show AVX-512 being roughly three times faster in a controlled test, with a link to the accompanying source code.