message: Andres request: cap gpuvis updates with vertical retrace
diff: @@ -2485,6 +2485,9 @@ int main( int argc, char **argv )
  SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
  SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 2 );
  + // 1 for updates synchronized with the vertical retrace
  + SDL_GL_SetSwapInterval( 1 );
  +
  SDL_DisplayMode current;
  SDL_GetCurrentDisplayMode( 0, &current );
  