c# - How accurate is System.Diagnostics.Stopwatch?

Question

How accurate is System.Diagnostics.Stopwatch? I am trying to do some metrics for different code paths and I need it to be exact. Should I be using stopwatch or is there another solution that is more accurate.

I have been told that sometimes stopwatch gives incorrect information.

Answer 1

I've just written an article that explains how a test setup must be done to get an high accuracy (better than 0.1ms) out of the stopwatch. I Think it should explain everything.

http://www.codeproject.com/KB/testing/stopwatch-measure-precise.aspx