Performance Measurement

PerformanceMeasurement.cs

const int WarmUpCount = 3;
const int TestCount = 100;

var stopWatch = new Stopwatch();
stopWatch.Reset();

for (int i = 0; i < WarmUpCount + TestCount; i++)
{
    if(i >= WarmUpCount)
        stopWatch.Start();

    var someVariable = FunctionCallToMeasure();

    if(i >= WarmUpCount)
        stopWatch.Stop();
}

var elapsed = stopWatch.ElapsedMilliseconds;
var averageRunTime = (decimal)elapsed/TestCount;