通用函数来测试任何代表的性能 [英] Generic function to test the performance of any delegate

问题描述

在测试不同方法实现的相对性能时，我发现自己重写类似于这个的函数。

When testing the relative performance of different method implementations I find myself re-writing functions similar to this.

private static long Measure(
    int iterations,
    Func<string, string> func,
    string someParameter)
{
    var stopwatch = new Stopwatch();
    stopwatch.Start();
    for (var i = 0; i < iterations; i++)
    {
        func(someParameter);
    }

    stopwatch.Stop();
    return stopwatch.ElapsedTicks;
}

与其为我测试的每种方法singnature重写此函数，它会是可能编写一个通用的实现来测试任何delagate的性能？

Rather than rewriting this function for every method singnature that I test, would it be possible to write a generic implementation for performance testing any delagate? Something along the lines of

    private static long Measure(
    int iterations,
    Delegate func,
    params object[] parameters)
{
    ...
}

或

    private static long Measure<TDelegate>(
    int iterations,
    TDelegate func,
    params object[] parameters)
{
    if (!typeof(TDelegate).IsSubclassOf(typeof(Delegate)))
    {
        throw new ArgumentException("Not a delegate", "func");
    }

    ...
}

如果我能做到这一点，那么 编译 Expression< TDelegate> ; 在执行迭代之前？

If I can do this would it make sense to Compile an Expression<TDelegate> before performing the iterations?

推荐答案

为什么不使用Action，在lambda中设置参数。

Why not use an Action and you can set the parameters in a lambda.

private static long Measure(int iterations, Action action)
{
    var stopwatch = new Stopwatch();
    stopwatch.Start();
    for (var i = 0; i < iterations; i++)
    {
        action();
    }

    stopwatch.Stop();
    return stopwatch.ElapsedTicks;
}

然后，您将它称为
$ b $ （100，（）=> MyMethod（arg1，arg2，...））; b

Then you call it like

Measure(100, () => MyMethod(arg1,arg2,...));

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