What exactly causes shader cache stuttering?

[tueidj]

(04-03-2015, 12:29 PM)NaturalViolence Wrote: Wait the compiling is done by the drivers not dolphin?  There are many games where the stutters often last several seconds, is that entire time seriously spent with the application waiting for the drivers to compile a shader?  What on earth could the drivers possibly be doing specifically that would take that long?

One does not question compilation speed.