private void EnsureStatisticsCalculated()
{
if (!statisticsCalculated)
{
_Best = null;
_Worst = null;
_NextBest = null;
foreach (var item in Data)
{
if (_Best == null || item.IterationsPerSecond > _Best.IterationsPerSecond)
{
_NextBest = _Best;
_Best = item;
}
else if (_NextBest == null || item.IterationsPerSecond > _NextBest.IterationsPerSecond)
{
_NextBest = item;
}
if (_Worst == null || item.IterationsPerSecond < _Worst.IterationsPerSecond)
{
_Worst = item;
}
}
}
}
private double PctDiff(PerfData result1, PerfData result2, bool showPctWorse)
{
double faster = result1.IterationsPerSecond > result2.IterationsPerSecond ?
result1.IterationsPerSecond : result2.IterationsPerSecond;
double slower = result1.IterationsPerSecond > result2.IterationsPerSecond ?
result2.IterationsPerSecond :result1.IterationsPerSecond;
if (showPctWorse)
{
return(faster != 0 ?
Math.Round(slower / faster, 2) :
0);
}
else
{
return(slower != 0 ?
Math.Round(faster / slower, 2) :
0);
}
}
private void EnsureStatisticsCalculated()
{
if (!statisticsCalculated)
{
_Best = null;
_Worst = null;
_NextBest = null;
foreach (var item in Data)
{
if (_Best == null || item.IterationsPerSecond > _Best.IterationsPerSecond)
{
_NextBest = _Best;
_Best = item;
}
else if (_NextBest == null || item.IterationsPerSecond > _NextBest.IterationsPerSecond)
{
_NextBest = item;
}
if (_Worst == null || item.IterationsPerSecond < _Worst.IterationsPerSecond)
{
_Worst = item;
}
}
}
}
public PerfData Test(Action action, TimeSpan maxTime, string testSource)
{
PerfData perfData = new PerfData {
Source = testSource
};
double diffMs = 0;
DateTime start = DateTime.Now;
// first test 1 iteration to make sure it's not really slow
try
{
action();
}
catch (Exception e)
{
perfData.Iterations = 0;
perfData.Time = TimeSpan.FromSeconds(0);
perfData.ErrorMessage = e.Message;
return(perfData);
}
TimeSpan diff = DateTime.Now - start;
if (diff > maxTime)
{
perfData.Iterations = 1;
perfData.Time = diff;
return(perfData);
}
diffMs = diff.TotalMilliseconds;
// now do a slightly better time estimate
if (diffMs < maxTime.TotalMilliseconds / 100 || diffMs == 5)
{
start = DateTime.Now;
int testIterations = 10;
for (int i = 0; i < testIterations; i++)
{
action();
}
diff = DateTime.Now - start;
diffMs = diff.TotalMilliseconds / testIterations;
}
int estimatedIterations = (int)Math.Floor(maxTime.TotalMilliseconds / diffMs);
// Try to check the time only 10 times per second, e.g. if we expect 500 iterations
// and time is 5 seconds than check every 10 iterations
int blockSize = Math.Max(1, (int)Math.Floor(estimatedIterations / maxTime.TotalSeconds / 10));
DateTime endTime = DateTime.Now + maxTime;
int iterations = 0;
start = DateTime.Now;
while (DateTime.Now < endTime)
{
for (int i = 0; i < blockSize; i++)
{
action();
}
iterations += blockSize;
}
TimeSpan totalTime = DateTime.Now - start;
perfData.Iterations = iterations;
perfData.Time = totalTime;
return(perfData);
}
private double HowMuchBetter(PerfData result1, PerfData result2)
{
return(PctDiff(result1, result2, false));
}
private double PercentWorse(PerfData result1, PerfData result2)
{
return((HowMuchWorse(result1, result2)) * 100);
}
private double HowMuchWorse(PerfData result1, PerfData result2)
{
return(PctDiff(result1, result2, true));
}
public PerfData Test(Action action, TimeSpan maxTime, string testSource)
{
PerfData perfData = new PerfData { Source = testSource };
double diffMs = 0;
DateTime start = DateTime.Now;
// first test 1 iteration to make sure it's not really slow
try
{
action();
}
catch (Exception e)
{
perfData.Iterations = 0;
perfData.Time = TimeSpan.FromSeconds(0);
perfData.ErrorMessage = e.Message;
return perfData;
}
TimeSpan diff = DateTime.Now - start;
if (diff > maxTime) {
perfData.Iterations=1;
perfData.Time = diff;
return perfData;
}
diffMs = diff.TotalMilliseconds;
// now do a slightly better time estimate
if (diffMs < maxTime.TotalMilliseconds/100 || diffMs == 5)
{
start = DateTime.Now;
int testIterations = 10;
for (int i = 0; i < testIterations; i++)
{
action();
}
diff = DateTime.Now - start;
diffMs = diff.TotalMilliseconds / testIterations;
}
int estimatedIterations = (int)Math.Floor(maxTime.TotalMilliseconds / diffMs);
// Try to check the time only 10 times per second, e.g. if we expect 500 iterations
// and time is 5 seconds than check every 10 iterations
int blockSize = Math.Max(1,(int)Math.Floor(estimatedIterations/maxTime.TotalSeconds/10));
DateTime endTime = DateTime.Now + maxTime;
int iterations=0;
start = DateTime.Now;
while (DateTime.Now < endTime) {
for (int i=0;i<blockSize;i++) {
action();
}
iterations+=blockSize;
}
TimeSpan totalTime = DateTime.Now - start;
perfData.Iterations = iterations;
perfData.Time =totalTime;
return perfData;
}
private double PctDiff(PerfData result1, PerfData result2, bool showPctWorse)
{
double faster = result1.IterationsPerSecond > result2.IterationsPerSecond ?
result1.IterationsPerSecond : result2.IterationsPerSecond;
double slower = result1.IterationsPerSecond > result2.IterationsPerSecond ?
result2.IterationsPerSecond :result1.IterationsPerSecond;
if (showPctWorse)
{
return faster != 0 ?
Math.Round(slower / faster, 2) :
0;
}
else
{
return slower != 0 ?
Math.Round(faster / slower, 2) :
0;
}
}
private double HowMuchBetter(PerfData result1, PerfData result2)
{
return PctDiff(result1, result2, false);
}
private double HowMuchWorse(PerfData result1, PerfData result2)
{
return PctDiff(result1, result2, true);
}
private double PercentWorse(PerfData result1, PerfData result2)
{
return (HowMuchWorse(result1, result2)) * 100;
}
