Mathias Stearn 244b162111 Use intrusive_ptr rather than shared_ptr for BSONObj ...

Advantages:
* Owned BSONObj now uses 1 heap allocation rather than 3
* sizeof(BSONObj) is now 16 rather than 24 (on 64 bit)
* perftest bson shows it to be much faster

Change in BSONObj constructor API for owned case to make sure old code gets
updated to allocate room for the ref count. Anyone using BSONObjBuilder doesn't
need to worry about this change.

2011-04-03 20:50:45 -04:00

17 KiB

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