[SDL] SDL_RenderCopy very slow on Lumia 520 Windows Phone 8.1

nivrig2 hello at nivrig.com
Fri Jan 29 16:36:05 PST 2016


I don't think we're having the same problem. I'm CPU bound in SDL with ~100 sprites, which seems way out of line with the device's general performance and its performance with other rendering engines.

SDL_RenderCopy (mostly D3D11_RenderCopy) accounts for 85% of this CPU time: 60% in D3D11_UpdateVertexBuffer "external code", 25% in "external code" in other parts of D3D11_RenderCopy.




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