tips for good rendering needed

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tips for good rendering needed
by Anes on 2006-09-19 (#17780)

well im back to nes emulation scene..

I just want some tips to make rendering faster, when i rip off rendering from the emulator, that means not to display anything to screen the emu (cpu, ppu, apu, etc) takes 4%~ of cpu time when i turn it on it takes 35%~ in a Pentium 4 2.8, visual c compiled and optimized at maximum (of course).
Help!!

by blargg on 2006-09-19 (#17783)

Run a profiler. Once you've done that (which I imagine you won't), try the following:

* Leave rendering in but disable the last step of drawing it to the screen. What is performance now?
* Malloc a memory buffer and (invisibly) render to that. What is the performance now?

How does your renderer work in general?