There are several places in the codebase where we have a PlanExecutor and a CursorResponse (or a bare BSONObjBuilder being used to build a cursor response), and loop over the results of the PlanExecutor until we have enough for a batch. We examine all these places and see if we can factor out some of the similarities into a helper function.

Some examples include:

• building the cursor response for aggregation
• building the cursor response for find
• building the cursor response for getMore
• building the cursor response for mongos' find