Now that Settings.GetPixel() and Settings.GetLocation() are thread safe (#245, #72) maybe we can turn on settings.misc.useParallel by default.

I created a GUI test app (/dev/Benchmark) which tests performance and assesses stability of the user controls. They seem stable for me, and parallel processing definitely improves performance for large datasets. With 10 million points my FPS doubled (25.5 FPS to 57.5 FPS)

There's also a pure-bitmap test which doesn't use the user control.