Add a controller and some views that perform a very simple load test.

This is not much of a load test, but it is better than nothing. I figured I should have something to use for comparisons if I was to try and optimize things.

It's just a controller action that makes http requests to another action in the same controller using multiple threads.
You need to keep refreshing the ApplyLoad action in the browser until the number of requests executed stabilize.

At least it gives a reasonable idea about how changes affect the performance.
Also, attaching a profiler and then running this action should be useful for figuring out where bottlenecks are. 

I ran this with and without ReplaceDonutsInChildActions. On my box the difference seems to be about 25%