https://bugs.freedesktop.org/show_bug.cgi?id=84662
--- Comment #57 from Michel Dänzer michel@daenzer.net --- I'm currently getting a "run time to unreal logo" of just over three minutes on my Kaveri. How about you, Andy? You said 3:45 is "good", so if it's below that now, this report can be resolved, right? :)
AFAICT the remaining pauses are mostly due to delayed shader compiles, which Marek has been working on reducing.