runtime: improve performance of IndexByte on older processors #14059
Labels
compiler/runtime
Issues related to the Go compiler and/or runtime.
NeedsFix
The path to resolution is known, but the work has not been done.
Performance
Milestone
Pre-avx2 processors use a loop of sse operations to do IndexByte. They use an unaligned load to do so. There may be a significant performance win by aligning the loads. See the comments at the end of https://go-review.googlesource.com/#/c/18703/
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