[Bug 46059] New: Final Fantasy XI Online: Mouse Movement Heavily Affects FPS

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46059

            Bug ID: 46059
           Summary: Final Fantasy XI Online: Mouse Movement Heavily
                    Affects FPS
           Product: Wine
           Version: 3.5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: user32
          Assignee: wine-bugs at winehq.org
          Reporter: escomk3 at hotmail.com
      Distribution: ---

This isn't exactly a new issue, and it hasn't been a bother before, especially
if one doesn't tend to use the mouse in the game, but it has become so bad that
moving the mouse around steadily makes the game a slide-show.  Bisect actually
took me a lot farther back in history than I would have guessed.

It seems commit c2e0ae5b [1] is responsible, and reverting it restores
abnormality (there's still a clear effect on the FPS, but it's very different,
and definitely not as drastic).

A quick 'operf' test, though I'm not sure how accurate or helpful it might
be...

Top 5 with the commit, without moving the mouse, and spinning the camera
steadily around using the keyboard during a period of about 10 seconds:

          samples|      %|
        ------------------
           377648 69.8603 wined3d.dll.so
            67991 12.5775 vmlinux
            41998  7.7691 libnvidia-glcore.so.410.66
            13403  2.4794 anon (tgid:18170 range:0x2681000-0x299dfff)
             9164  1.6952 dsound.dll.so

Now with additionally moving the mouse around (if in windowed mode, the cursor
needs to go over the game window, whether it's the active window or not):

          samples|      %|
        ------------------
           201289 38.5848 wined3d.dll.so
           163583 31.3570 libwine.so.1.0
            51344  9.8420 vmlinux
            41387  7.9334 gdi32.dll.so
            12685  2.4316 libnvidia-glcore.so.410.66

Now without the commit, while moving the mouse (without moving the mouse,
there's not much of a difference as one might expect):

          samples|      %|
        ------------------
           452427 67.5044 wined3d.dll.so
            85858 12.8104 vmlinux
            40397  6.0274 libnvidia-glcore.so.410.73
            22614  3.3741 libwine.so.1.0
            14258  2.1274 anon (tgid:3579 range:0x2681000-0x299dfff)

To get a bit more in-depth, I gave 'opannotate' a go, though it may be
inaccurate even according to its docs.

The highest spikes would seem to come from a 'switch(index)' [2], with 35667
samples, and 'if (index >= nb_dll_paths) return NULL;' [3] with 44687 samples. 
Without the commit, these lines get hit with only 4811 and 6023 samples
respectively.

1.
https://source.winehq.org/git/wine.git/commit/c2e0ae5bfd084d9b34c46517507e5d31d61494e4
2.
https://source.winehq.org/git/wine.git/blob/c2e0ae5bfd084d9b34c46517507e5d31d61494e4:/libs/wine/loader.c#l223
3.
https://source.winehq.org/git/wine.git/blob/c2e0ae5bfd084d9b34c46517507e5d31d61494e4:/libs/wine/loader.c#l244

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