So, is it viable to create a javascript emulator that would run at full speed? The answer is yes.
Results greater than 100% mean that will work faster than on a real PSP (in theory):http://jspspemu.com/#samples/compilerPerf.elf
Due to javascript to not have “goto” keyword, it will harder to make it faster, but it is definetively possible to get fullspeed with current hardware.
http://jspspemu.com/#samples/sprite.pbp
| About rendering speed. jspspemu is using WebGL and the speed is mostly limited by the gpu, so the rendering speed will be similar to other emulators using OpenGL | ES. |