[SDL] SDL_Flip() slow on X11 in windowed mode while scrolling in Firefox

Ulf Magnusson ulfalizer at gmail.com
Sat Oct 5 11:45:55 PDT 2013


Scrolling in Firefox (but not Chromium) causes
SDL_Flip()/SDL_UpdateRect() to take much longer to complete in
windowed mode on my machine, making my emulator drop below 60 FPS and
causing sound skips. Any ideas what might be causing this and how it
could be mitigated (besides dropping SDL_Flip() calls or doing work in
a separate thread)? Is this something that might have improved in SDL

SDL 1.2.15
Ubuntu 13.04, 64-bit
nouveau 1.0.7
GeForce GT 430


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