Speedup early exit

Hello, I have recently sped up early exti in my fork - so that I can open and close my application without big pause of waiting for the init thread of jetlive to finish: https://github.com/Hexlord/jet-live/commit/5590a3618dee757f259a485f11c39eab3d2fe723
Hacky, but maybe it will be useful for others!