Mathias Stearn 47dc95d429 SERVER-12373 Optimize $group by artificial objects ...

This avoids building the _id (group key) objects while processing inputs to
$group. Instead it just remembers the values of the fields, and saves building
the object until it is preparing the output.

2014-02-10 19:05:31 -05:00

1.1 KiB

Raw Blame History

View Raw