Find Usages doesn't work well

If you press CTRL-ALT-F7 in a keyword that is used a lot, like a `toString()` declaration (in a large codebase), it will take **FOREVER** to finish. Actually I am not sure it would finish, I could never really wait enough to see it finish. I just see this:


Why does it take so long? It should be fast, since it should simply find the usages of `toString()` on objects of that specific class and its subclasses, which are very few. Or, it's trying to find usages of the upmost base class? That seems wrong. If I wanted to find usages for the base class I could just go to the base class and find usages there.

**HOW TO REPRODUCE**

Open any large codebase, go to any `toString()` declaration, and press `CTRL-B` (in Windows).