[SERVER-20377] DocumentSourceUnwind::Unwinder should use a MutableDocument to create output documents Created: 11/Sep/15  Updated: 06/Dec/22

Status: Backlog
Project: Core Server
Component/s: Aggregation Framework, Internal Code
Affects Version/s: 3.1.7
Fix Version/s: None

Type: Improvement Priority: Major - P3
Reporter: Charlie Swanson Assignee: Backlog - Query Execution
Resolution: Unresolved Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Query Execution
Backwards Compatibility: Fully Compatible
Sprint: QuInt A (10/12/15), QuInt B (11/02/15)
Participants:

 Description   

Currently it uses a Document, and creates a MutableDocument copy of it each time it outputs the next Document. The more efficient implementation is to hold a MutableDocument as _output, set the relevant fields on that, and return _output.peek() each time (except the last time, when _output.freeze() can be used).


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