#quadplay now hashes the entire virtual GPU command stream, and when it detects a duplicate frame does not render it.

Since many games have 15 fps animations or static screens, this can reduce load significantly. In a strategy game I was profiling it reduces the work per frame from 1.1ms to 0.2ms!

I did this as a mobile power/heat optimization--it doesn't help framerate/performance, since it targets games that aren't pushing perf.