[Interest] CPU usage

Thiago Macieira thiago.macieira at intel.com
Fri Dec 30 19:46:31 CET 2016


Em sexta-feira, 30 de dezembro de 2016, às 19:13:58 BRST, Igor Mironchik 
escreveu:
> 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?

Profile it. When you find out what function is taking so much CPU time, break it 
down into smaller parts until you identify the coding mistake.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center




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