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Timing different variants of string.StartsWith

/ Published in: C#
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Just an example of timing code

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  1. var a = "foo bar foo";
  2. var b = "foo";
  3.  
  4. int numTimes = 1000000;
  5.  
  6. var swOrdinal = Stopwatch.StartNew();
  7.  
  8. for (int i = 0; i < numTimes; i++)
  9.     a.StartsWith(b, StringComparison.Ordinal);
  10.  
  11. swOrdinal.Stop();
  12.  
  13. Console.WriteLine("Ran {0:N0} ordinal iterations in {1}ms", numTimes, swOrdinal.Elapsed.TotalMilliseconds);
  14.  
  15. var swCulture = Stopwatch.StartNew();
  16.  
  17. for (int i = 0; i < numTimes; i++)
  18.     a.StartsWith(b);
  19.  
  20. swCulture.Stop();
  21.  
  22. Console.WriteLine("Ran {0:N0} culture-sensitive iterations in {1}ms", numTimes, swCulture.Elapsed.TotalMilliseconds);

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