Lzct SSE instruction when available
LeeCampbell opened this issue · comments
We currently have at the heart of the hot path a manual method for find the leading zero count.
This is used to identify the correct bucket to assign a recorded value.
Frustratingly, this is supported as an intrinsic instruction on most modern CPU architectures.
The code is found in Bitwise.NumberOfLeadingZeros, and has been isolated with the intent that it can be a single place to refactor/optimize if the opportunity arises.
Follow this .NET core issue for progress/resolution https://github.com/dotnet/corefx/issues/2209
Moved to HdrHistogram/HdrHistogram.NET#42