[Bug 50923] New: Long freezes in osu! when searching in beatmaps

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50923

Bug ID: 50923
           Summary: Long freezes in osu! when searching in beatmaps
           Product: Wine-staging
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Created attachment 69739
  --> https://bugs.winehq.org/attachment.cgi?id=69739
Patch that adds a single-entry sortguid cache to sortkey_compare

Wine-Staging patchset libs-Unicode_Collation makes CompareStringEx far slower
than before. This is because the sortkey_compare function added by the last
patch and used by CompareStringEx makes a call to get_language_sort, which is
not exactly cheap (it reads from the registry which involves server calls).

A small patch that adds a simple cache for the last used sortguid makes the
search function fast again.