[COUCHDB-3425] Make _doc_ids _changes filter fast-path limit configurable

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Component/s: Database Core
• Assignee: Unassigned
• Reporter: Alex Anderson
• Created: 25/May/17 21:15
• Updated: 02/Sep/18 07:07
• Resolved: 02/Sep/18 07:07

Description

For the builtin filter `_docs_ids`, the maximum number of documents for which we trigger the optimized code path is hardcoded to 100 here:

https://github.com/apache/couchdb/blob/master/src/couch/src/couch_changes.erl#L32-L34

It would be helpful if this number was configurable.