How to clear the cache?

Is there a cache? The `electron-rebuild` process completes really fast, which makes it seem like it is using results from a cache? If so, where is it so I can delete it?

Start by tracing the electron-rebuild process and checking whether it uses a cache for completed rebuilds. Done means documenting whether a cache exists, where it is stored, and how users can clear it; the issue names no source file or test to begin with.

Written by the indexing model from the issue text.