I'm running into some performance issues. I'm using Firefox ESR 31.1.0 on a 
linux computer. I compile my application, which makes use of the Surface 
portion of the SDL API, with the following command:

emcc -v -O2 -Wall -Werror -s ASSERTIONS=2 -s USE_SDL=2 --preload-file 
foo.tmp myapp.c -o bin/myapp.html

The window is 800x600. SDL_UpdateWindowSurfaceRects is taking 110ms on 
average to redraw what probably amounts to half the screen at a given time.

Is this what you would expect? Do I need to change how I draw, or compile 
differently?

Thanks!

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