Emulator Performance

[christopherhesse]

It looks like inlining a method and creating some constants improves speed dramatically on ALE: Farama-Foundation/Arcade-Learning-Environment#265

It's possible there are similar simple changes that could be made to other emulators.

[endrift]

Most of the other emulators have already had deep amounts of optimization already worked on, so Stella may be the odd one out here, not the average case.

[mgbellemare]

As FYI, Xitari (https://github.com/deepmind/xitari) is sped up about 100% relative to ALE, although it also stripped some actual functionality in the process...

[endrift]

Writing new libretro bindings for ALE's Stella might be a better idea than speeding up the newer version of Stella.

[christopherhesse]

Going to close this in favor of #127 since it sounds like most cores are already optimized a decent amount.

[christopherhesse]

Although with some fancy customizations, it's likely we still could improve performance of the emulators since we care more about speed than accuracy.