realm/realm-cocoa — pull request #759 by tgoyne (2014-08-08 18:47:29+00:00)
Title: Throw an exception when objects are used on the wrong thread

Speed impact is <1% for all of the performance tests other than array property enumeration and adding standalone objects to a realm. Those two were around 10% slower, so I made a quick optimization pass and got both faster than they were before this change.

@alazier