Computing CPU time in C++ on Windows

Question

Is there any way in C++ to calculate how long does it take to run a given program or routine in CPU time?

I work with Visual Studio 2008 running on Wind

Answer 1

The __rdtscp intrinsic will give you the time in CPU cycles with some caveats. Here's the MSDN article

It depends really what you want to measure. For better results take the average of a few million (if not billion) iterations.