Today I tell you about one of my favorite benchmarks (this method doesn't return a useful value, we need it only as an example):
[Benchmark]
public string Sum()
{
double a = 1, b = 1;
var sw = new Stopwatch();
for (int i = 0; i < 10001; i++)
a = a + b;
return string.Format("{0}{1}", a, sw.ElapsedMilliseconds);
}
An interesting fact: if you call Stopwatch.GetTimestamp() before the first call of the Sum method, you improve Sum performance several times (works only with LegacyJIT-x86).