ojhunt wrote:
Rather than per site branches, it might be better to just remove the table
lookup if we can. I recognize that there might well be other characters that
set these flags for historical reasons, but I'd be interested in see the ideal
perf of something like this:
```cpp
bool isHorizontalWhitespace(char Ch) {
return Ch == ' ' || Ch == '\t' || Ch == '\f' || Ch == '\v';
}
```
It should compile down to something pretty much branchless on most modern
targets
https://github.com/llvm/llvm-project/pull/180819
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