[Bug 5309] New: Wine performance lost on some CJK environment

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5309

           Summary: Wine performance lost on some CJK environment
           Product: Wine
           Version: CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: wine-x11driver
        AssignedTo: wine-bugs(a)winehq.org
        ReportedBy: hzhrong(a)gmail.com


I notice some CJK users complain that wine is too slow to run apps, when
clicking menu, or opening dialog box, it takes too long time to display. And
they said, if killed X input method, wine run fast again.
I haven't meet this problem until I changed X FontPath one day, yes, Wine run
very slowly, got very import performance problem. When I killed X input method,
it's fast again. So I realize it's a XIM related bug.
While reviewing dlls/x11drv/xim.c, in function X11DRV_CreateIC, about line 487,
I see the following code:
    fontSet = XCreateFontSet(display,
                      "*", /*FIXME*/
                      &list, &count, NULL);

So, it's clear that it cause the problem. Looking for a matched "*" X fontSet is
ofen fast if there is no X core font lacked, otherwise it will take a long time.
In my case, in zh_CN.GBK or zh_CN.UTF-8 locale, X core font *-gbk-0 are missing.
When I add these fonts back, the problem resolved.
For a solution, I suggest to use "fixed" instead of "*", since modern X input
method apps doesn't use XFontSet anymore. Change to:
    fontSet = XCreateFontSet(display,
                      "fixed",
                      &list, &count, NULL);

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