change clock's precision [closed]

问题

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Closed 7 years ago.

Env: Win Xp, Visual C++

I use clock() to measure the time cost in my program. But the t_clock always be the multiply of 10, for example 10, 20, 30, 40,... And I want to get the precision of 1, such as 11, 12, 13, 14... How can I change the t_clock's precision?

thanks

回答1:

You can't; clock() uses the system's ordinary RTC. What you actually need to use are High Performance Timers. http://msdn.microsoft.com/en-us/magazine/cc163996.aspx

回答2:

Use the timeBeginPeriod API call to increase resolution to 1ms.

来源：https://stackoverflow.com/questions/5192120/change-clocks-precision