[Bug 49852] New: Performance regression in "msvcrt: Use correct code page in _write when outputing to console."

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49852

Bug ID: 49852
           Summary: Performance regression in "msvcrt: Use correct code
                    page in _write when outputing to console."
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: msvcrt
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 68190
  --> https://bugs.winehq.org/attachment.cgi?id=68190
Test sample

Since 081d25d4b989c732d301b786311c034132c8d7a3, "msvcrt: Use correct code page
in _write when outputing to console.", a test app (that prints a lot to stdout)
had an around 10-20x slowdown.

Before, "time wine64 ihateeh-x86_64.exe > /dev/null 2>&1" ran in around 1
second, after that commit it takes 15 seconds. (At some later point, it has
regressed further to 25 seconds. The corresponding testcase on aarch64 used to
run in 3 seconds, after the commit it takes 60, and with current master takes
around 120 seconds.)