[Bug 49663] Performance regression in TrackMania Nations Forever

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49663

--- Comment #6 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Fabian Maurer from comment #4)
> (In reply to Zebediah Figura from comment #3)
> > That patch can't work as-is; we need memcpy to act like memmove.
> 
> Why is that?

Applications depend on it. See this comment from msvcrt:string:

https://source.winehq.org/git/wine.git/blob/HEAD:/dlls/msvcrt/tests/string.c#l4370

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