mongodb/docs — pull request #1756 by rueckstiess (2014-05-02 20:27:33+00:00)
Title: DOCS-3338 added note about sort order to $near and geoNear.

To make clearer that sorting on anything other than the distance (which is done by default with these operations) is done in memory and not efficient. Instead, $geoWithin should be used.