Doctrine madness!

Hi gang, If anyone out there has some experience w/ Doctrine now would be a great time to share it! So I'm writing a batch importer and noticed memory usage climbing during script execution. In the debugging effort I've isolated it down to a Doctrine issue. Here's what's going on, I instantiate a model object for the product table from my application $newRecord = new Product(); at this point memory usage goes up noticeably. I don't really care though because I figure I can delete it, but look at this madness I have going (which *fails* to free up the memory) $newRecord->clearRelated(); $newRecord->free(); unset($newRecord); gc_collect_cycles(); after all of this memory consumption is still dramatically higher than prior to the first call creating the object above. This I've verified through memory_get_usage(). here's the output from the memory_get_usage() calls int(166461440) // before new Product() int(169345024) // directly after new Product() int(169345024) // after madness trying to free memory used by new Product() I've also tried an explicit call to the destructor of $newRecord, but that results in a fatal attempting to call an unknown method. Any help would be greatly appreciated as google hasn't been able to point me to the answer thus far. thx, -nathan