We are building a custom marketo sync to integrate into a custom CRM.  Calling getLeadChanges() is extreamly slow.  This is the intial load so over time there will be less data. 
Some info about the process:
- 
		batches of 500
- 
		the process has been going for about 12 hours
- 
		we have called your API about 360 times
- 
		each call to your API is about 2 minutes
Do you have any recommendations to help speed this up?  Can we add some indexes or something to the activities?
-Jason