public static void TestStdDev()
{
//List<int> integers = new List<int> { 3, 4, 5, 6, 7 };
List <double> doubles = new List <double> {
3.0, 4.0, 5.0, 6.0, 7.0
};
double doubleStdDev = StatisticsHelper.StdDev(doubles);
Console.WriteLine(doubleStdDev);
}
/// <summary>
/// 1: Using While ViewHelper.AskForDoubleWhile <br/>
/// 2: Do-While loop AskForDouble <br/>
/// 3: No clear arg: AskForDoubleNoClearArg <br/>
/// 4: AskForDoubleNoClearArgBreakLoop ->
/// 5: AskForDoubleNoClearArgBreakLoopWriteOptimised
/// </summary>
private static void ViewHelperTimeImprovement()
{
Dictionary <string, List <double> > triesData = new Dictionary <string, List <double> >
{
{ "UsingWhile", new List <double>() },
{ "UsingDoWhile", new List <double>() },
{ "ViewHelper as an object", new List <double>() },
{ "BreakLoop", new List <double>() },
{ "tryparse", new List <double>() },
{ "WriteFormatting", new List <double>() }
};
List <ViewHelperData> viewHelperData = new List <ViewHelperData>();
Stopwatch watch = new Stopwatch();
ViewHelperData vhdata;
var vhconst = new ViewHelperConstructor();
watch.Start();
while (watch.ElapsedMilliseconds < 1200) // A Warmup of 1000-1500 mS
{ // stabilizes the CPU cache and pipeline.
ViewHelper.AskForDoubleWhile("WARM UP");
}
watch.Stop();
watch.Reset();
for (int i = 0; i < 2000; i++)
{
//Mean: 0,5192 Median: 0,37765
vhdata = new ViewHelperData();
watch.Start();
ViewHelper.AskForDoubleWhile("while");
watch.Stop();
triesData["UsingWhile"].Add(watch.ElapsedTicks);
vhdata.UsingWhile = watch.ElapsedTicks;
watch.Reset();
//Mean: 0,4811 Median: 0,3746
watch.Start();
ViewHelper.AskForDouble("default");
watch.Stop();
triesData["UsingDoWhile"].Add(watch.ElapsedTicks);
vhdata.UsingDoWhile = watch.ElapsedTicks;
watch.Reset();
//Mean: 0,4813 Median: 0,37515
watch.Start();
vhconst.AskForDouble("vhconst hello");
watch.Stop();
triesData["ViewHelper as an object"].Add(watch.ElapsedTicks);
vhdata.ViewHelperAsAnObject = watch.ElapsedTicks;
watch.Reset();
//Mean: 0,4360 Median: 0,3569
watch.Start();
ViewHelper.AskForDoubleBreakLoop("break loop!");
watch.Stop();
triesData["BreakLoop"].Add(watch.ElapsedTicks);
vhdata.BreakLoop = watch.ElapsedTicks;
watch.Reset();
// What happened?
//Mean: 0,1703 Median: 0,0531
watch.Start();
ViewHelper.AskForDoubleTryParse("tryparse");
watch.Stop();
triesData["tryparse"].Add(watch.ElapsedTicks);
vhdata.TryParse = watch.ElapsedTicks;
watch.Reset();
//Mean: 0,4446 Median: 0,3784
watch.Start();
ViewHelper.AskForDoubleOptimised("write optimised");
watch.Stop();
triesData["WriteFormatting"].Add(watch.ElapsedTicks);
vhdata.WriteOptimised = watch.ElapsedTicks;
watch.Reset();
viewHelperData.Add(vhdata);
}
Console.WriteLine();
string outputFormat = "{0,-20} Min: {1,-9} Mean: {2,-9} Median: {3,-9} StDev: {4,-9} Max: {5,-9}";
foreach (var element in triesData)
{
Console.WriteLine(outputFormat, element.Key, element.Value.Min(), element.Value.Average(),
StatisticsHelper.GetMedian(element.Value), StatisticsHelper.StdDev(element.Value), element.Value.Max());
}
//Console.WriteLine("Allocated memory: {0}kb", GC.GetTotalAllocatedBytes(true)/1024);
//string filename = $"viewHelperImprovement_{DateTime.Now.Millisecond}.csv";
//using (var writer = new StreamWriter(filename))
//using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
//{
// csv.WriteRecords(viewHelperData);
//}
//Console.WriteLine("Data saved to: " + filename);
}
