[LUCENE-7915] Avoid looping over merge segments in best merge selection

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: trunk, 7.1
• Component/s: core/index
• Lucene Fields: New
• Assignee: Tommaso Teofili
• Reporter: Tommaso Teofili
• Created: 01/Aug/17 12:15
• Updated: 17/Oct/17 11:03
• Resolved: 01/Aug/17 13:09

Description

With java 8 we can trivially avoid looping over merge segments to be merged, switching from

for(SegmentCommitInfo info : merge.segments) {
  toBeMerged.add(info);
}

to :

toBeMerged.addAll(merge.segments);