Windows x64?

[Orphis]

I could easily build 64 bits build, but as Unknown said, the gain is very minimal. It's very unlikely that a game is limited by the CPU, this isn't a very powerful CPU we are emulating after all.
If using a faster CPU helped a game, that's more likely there's a problem elsewhere and there are better ways to fix it. Since some devs are focusing on mobiles, these fix will probably be made for these platforms and then help the desktop version to be even faster.