Re: [PATCH 0/2] MR5696: kernelbase: Handle SORTHANDLE in LCMapStringEx.

[Daniel Lehman (＠dlehman25)]

an optimization for _wcsicmp_l

it's meant to be used internally, but i added tests to try to match windows behavior

24a2b625545f1875b5c3177f2b9da1b7299b864f degraded performance.  perf showed most time was spent in get_language_sort.  _wcsicmp_l is being used heavily for std::map/set

_wcsicmp_l calls _towlower_l for each letter of both strings, which in turn calls:

towlower_l -> LCMapStringW -> LCMapStringEx -> get_language_sort

the sortguid is the same since the same locale is passed.  using SORTHANDLE gets the performance roughly where it was

here are all 5 commits, if you want to see where it's going:
https://gitlab.winehq.org/dlehman25/wine/-/tree/wcsicmp4