[Scummvm-tracker] [ScummVM :: Bugs] #15492: SCUMM: MONKEY2 (MAC): Slow rendering with Macintosh titles on OSX PPC in 2.9.0pre

[ScummVM :: Bugs]

#15492: SCUMM: MONKEY2 (MAC): Slow rendering with Macintosh titles on OSX PPC in
2.9.0pre
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Reporter:  dwatteau         |      Owner:  (none)
    Type:  defect           |     Status:  new
Priority:  normal           |  Component:  Engine: SCUMM
 Version:                   |   Keywords:  macintosh,performance,rendering
    Game:  Monkey Island 2  |
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 Current Git HEAD on OSX PPC (either 10.4 or 10.5).

 Built with GCC 7.5.0 and optimizations.

 As an example, the following Monkey2 configurations run fine:

 * Monkey Island 2 DOS/English on the same machine
 * Monkey Island 2 Macintosh in ScummVM 2.8.x with the same settings

 but the following config has performance problems:

 * Monkey Island 2 Macintosh on current ScummVM 2.9.0pre

 When I play the Macintosh in full screen, the FPS feels slow. Guybrush
 walking from the right to the left of the screen after talking with Bart &
 Fink, or Guybrush crossing the Woodtick bridge before meeting Largo, is
 quite slow and interrupted.

 Typing `rough` in order to disable the smooth graphics effect doesn't
 appear to fix the problem. I can't say if the issue is related to that, or
 the new MacGUI interface, or the gamma correction, or something else.

 I'm attaching performance analysis output below.
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Ticket URL: <https://bugs.scummvm.org/ticket/15492>
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