Can Delegate.DynamicInvoke be avoided in this generic code?

Question

This question is partly about delegates, and partly about generics.

Given the simplified code:

internal sealed class TypeDispatchProcessor
{
    private          


        

Answer 1

I strongly suspect that wrapping the calls would be a lot more efficient than using DynamicInvoke. Your code would then be:

internal sealed class TypeDispatchProcessor
{
    private readonly Dictionary> _actionByType 
        = new Dictionary>();

    public void RegisterProcedure(Action action)
    {
        _actionByType[typeof(T)] = item => action((T) item);
    }

    public void ProcessItem(object item)
    {
        Action