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This at least is about a 3500 modules build: https://developer.squareup.com/blog/herding-elephants/ But I didn't actually read it, so I don't know whether there are performance measurements included.

thanks, this looks like a great example!

Potential benefits of multiple modules: • smaller amount to compile when changes occur (depends on the scope of the changes); • compiling, testing in parallel across modules/projects;

Also see https://developer.squareup.com/blog/celebrating-the-release-of-android-studio-electric-eel/ Note that Square is using Android Studio. The sync/import process is very different from IntelliJ, the Studio one is more expensive. Also, IntelliJ itself doesn't leverage parallel TAPI model building yet.