Accelerate the emulator

[wissammm]

Hello !
I’m currently developing a reinforcement learning environment inspired by your project, and I was wondering if there’s a way to accelerate the emulation. I’ve already turned off VSync.

[michelhe]

I assume you compile in release mode already 😅 ?
Try with profile=release-lto.
Also - in the past past, I have seen about a 5% gain with Profile Guided Optimization. Try to collect profiles from a clean pokemon emerald run.

That being said, my emulator has always been relatively slow compared to other C++-based emulators. I remember doing some extensive profiling and micro-optimizations to get it to run at 60 FPS on my Xiaomi Mi Box Android TV, whose CPU was so weak it couldn't keep up, even with VSync disabled.

I already do some very unsound stuff (#177) just to get away with runtime bound checks. Also might be worth testing replacing my Arm7tdmi emulation with something like https://github.com/daniel5151/armv4t_emu , it might be faster.. you can start by doing some benchmark across both CPU impls