I and others here who work with WP plugins are not quite use to a plugin which starts working when you hit the plugin link at admin's left panel. Can you in the future add a
1 -Optimize button at top of the application? It is good for all, and for the marking of this great plugin, to be able to see the before optimizing screen
2 - Tell us the amount of bytes were removed as a result of the optimization.
3 - The size of the database
My guess, you are already working on these. :)