GarbageCollect
From Spheriki
GarbageCollect invokes SpiderMonkey's garbage collection routine, which will destroy any unused objects, freeing their memory.
Usage
Notes
GarbageCollect will usually not be needed for most games. You should consider using it if your game creates and destroys a lot of objects in a short space of time and appears to be taking up more memory than it should. In this case, adding a call to GarbageCollect may help.
