MethodInvoker vs Action for Control.BeginInvoke

Question

Which is more correct and why?

Control.BeginInvoke(new Action(DoSomething), null);

private void DoSomething()
{
    MessageBox.Show(\"What a great post\");
         


        

Answer 1

For each solution bellow I run a 131072 (128*1024) iterations (in one separated thread). The VS2010 performance assistant give this results:

• read-only MethodInvoker: 5664.53 (+0%)
• New MethodInvoker: 5828.31 (+2.89%)
• function cast in MethodInvoker: 5857.07 (+3.40%)
• read-only Action: 6467.33 (+14.17%)
• New Action: 6829.07 (+20.56%)

Call to a new Action at each iteration

    private void SetVisibleByNewAction()
    {
        if (InvokeRequired)
        {
            Invoke(new Action(SetVisibleByNewAction));
        }
        else
        {
            Visible = true;
        }
    }

Call to a read-only, build in constructor, Action at each iteration

    // private readonly Action _actionSetVisibleByAction
    // _actionSetVisibleByAction= SetVisibleByAction;
    private void SetVisibleByAction()
    {
        if (InvokeRequired)
        {
            Invoke(_actionSetVisibleByAction);
        }
        else
        {
            Visible = true;
        }
    }

Call to a new MethodInvoker at each iteration.

    private void SetVisibleByNewMethodInvoker()
    {
        if (InvokeRequired)
        {
            Invoke(new MethodInvoker(SetVisibleByNewMethodInvoker));
        }
        else
        {
            Visible = true;
        }
    }

Call to a read-only, build in constructor, MethodInvoker at each iteration

    // private readonly MethodInvoker _methodInvokerSetVisibleByMethodInvoker 
    // _methodInvokerSetVisibleByMethodInvoker = SetVisibleByMethodInvoker;
    private void SetVisibleByMethodInvoker()
    {
        if (InvokeRequired)
        {
            Invoke(_methodInvokerSetVisibleByMethodInvoker);
        }
        else
        {
            Visible = true;
        }
    }

Call to the function cast in MethodInvoker at each iteration

    private void SetVisibleByDelegate()
    {
        if (InvokeRequired)
        {
            Invoke((MethodInvoker) SetVisibleByDelegate);
        }
        else
        {
            Visible = true;
        }
    }

Example of call for the "New Action" solution :

    private void ButtonNewActionOnClick(object sender, EventArgs e)
    {
        new Thread(TestNewAction).Start();
    }

    private void TestNewAction()
    {
        var watch = Stopwatch.StartNew();
        for (var i = 0; i < COUNT; i++)
        {
            SetVisibleByNewAction();
        }
        watch.Stop();
        Append("New Action: " + watch.ElapsedMilliseconds + "ms");
    }