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Benchmark Template
/* This is a benchmarking template I use in LINQPad when I want to do a
* quick performance test. Just give it a couple of actions to test and
* it will give you a pretty good idea of how long they take compared
* to one another. It's not perfect: You can expect a 3% error margin
* under ideal circumstances. But if you're not going to improve
* performance by more than 3%, you probably don't care anyway.*/
void Main()
{
// Enter setup code here
var actions = new[]
{
new TimedAction("first", () =>
{
// Enter code to test here
}),
new TimedAction("second", () =>
{
// Enter code to test here
}),
// Enter additional tests here
};
const int TimesToRun = 10000000; // Tweak this as necessary
TimeActions(TimesToRun, actions);
}
#region timer helper methods
// Define other methods and classes here
public void TimeActions(int iterations, params TimedAction[] actions)
{
Stopwatch s = new Stopwatch();
int length = actions.Length;
var results = new ActionResult[actions.Length];
// Perform the actions in their initial order.
for(int i = 0; i < length; i++)
{
var action = actions[i];
var result = results[i] = new ActionResult{Message = action.Message};
// Do a dry run to get things ramped up/cached
result.DryRun1 = s.Time(action.Action, 1);
result.FullRun1 = s.Time(action.Action, iterations);
}
// Perform the actions in reverse order.
for(int i = length - 1; i >= 0; i--)
{
var action = actions[i];
var result = results[i];
// Do a dry run to get things ramped up/cached
result.DryRun2 = s.Time(action.Action, 1);
result.FullRun2 = s.Time(action.Action, iterations);
}
results.Dump();
}
public class ActionResult
{
public string Message {get;set;}
public double DryRun1 {get;set;}
public double DryRun2 {get;set;}
public double FullRun1 {get;set;}
public double FullRun2 {get;set;}
}
public class TimedAction
{
public TimedAction(string message, Action action)
{
Message = message;
Action = action;
}
public string Message {get;private set;}
public Action Action {get;private set;}
}
public static class StopwatchExtensions
{
public static double Time(this Stopwatch sw, Action action, int iterations)
{
sw.Restart();
for (int i = 0; i < iterations; i++)
{
action();
}
sw.Stop();
return sw.Elapsed.TotalMilliseconds;
}
}
#endregion
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