square/cube — pull request #87 by Marsup (2012-07-27 15:00:12+00:00)
Title: Use ObjectID timestamps instead of dedicated field

Hello Mike,

This is my attempt to solve issue #16. Tests are good on my side except `test.js` which was already failing.
I've followed your will to keep the `id` in `d` with a sparse unique index.

I haven't run any performance comparison but I'd be interested to know if you give it a shot.