Understanding for ember-cli/loader.js require._stats properties

I've tried searching a variety of google searches and whether it's the bloated word require or unfriendliness to ./_ I cannot find information around this.

I'm digging into require._stats to try and understand the performance of my application based on modules defined, used, etc and the properties under require._stats look like useful tools into discovering this information.

I have a rough idea of what a few of the following mean but am curious on solid definitions for the following fields that pop up after typing require._stats in the dev console (linking to any external resources is appreciated as well):

1. define
2. exports
3. findDeps
4. findModule
5. modules
6. pendingQueueLength
7. reify
8. require
9. resolve
10. resolveRelative