[COUCHDB-977] make skip leverage inner reduction node counts

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.1
• Fix Version/s: 1.1.1, 1.2
• Component/s: Database Core
• Skill Level: Regular Contributors Level (Easy to Medium)
• Assignee: Randall Leeds
• Reporter: Randall Leeds
• Created: 06/Dec/10 22:04
• Updated: 30/Jul/11 00:39
• Resolved: 30/Jul/11 00:39

Description

Currently the skip parameter on _all_docs and views walks n nodes from the startkey to the first result but the inner nodes have counts in the reduction so some branches can be skipped entirely.

Issue Links

• is related to: COUCHDB-1076 _all_docs performance degrades as doc_del_count increases