[Bug 49852] 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

--- Comment #3 from Martin Storsjö <martin at martin.st> ---
Thanks for having a look!

(In reply to Jacek Caban from comment #2)
> Avoiding using tty code path reduces that time to 2.5s (something like wine
> ihateeh-x86_64.exe |cat)

Oh, that's interesting. So pipeing stdout in that case makes it a non-tty,
avoiding the slow code, but redirecting stdout to /dev/null still considers it
a tty?

> The application takes about 14s to run on Windows for me, so our performance is not
> really that bad in comparison.

Fair enough - I guess the testcase is rather extreme in the amount of output it
produces. (The only sensible way to run it is by piping the output to /dev/null
anyway.)

I guess one way to avoid it altogether would to have a look if I could cut some
of the amount of IO done in the testcase, while keeping the functionality...

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