Hello, I do app that uses USB camera. And I found that this app uses very much CPU time. Profiler says that: AMGetErrorTextW 8.82s 11.22s 38.74% 49.28% quartz [unknown] 0 0x5ded687f MsgWaitForMultipleObjectsEx 6.62s 6.62s 29.08% 29.09% USER32 [unknown] 0 0x75578977 What can I do to optimize this? Thank you.