[HBASE-14099] StoreFile.passesKeyRangeFilter need not create Cells from the Scan's start and stop Row

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Performance, Scanners
• Assignee: ramkrishna.s.vasudevan
• Reporter: ramkrishna.s.vasudevan
• Created: 16/Jul/15 11:42
• Updated: 02/Mar/16 05:33
• Resolved: 02/Mar/16 05:33

Description

During profiling saw that the code here in passesKeyRangeFilter in Storefile

  KeyValue smallestScanKeyValue = scan.isReversed() ? KeyValueUtil
          .createFirstOnRow(scan.getStopRow()) : KeyValueUtil.createFirstOnRow(scan
          .getStartRow());
      KeyValue largestScanKeyValue = scan.isReversed() ? KeyValueUtil
          .createLastOnRow(scan.getStartRow()) : KeyValueUtil.createLastOnRow(scan
          .getStopRow());

This row need not be copied now considering that we have CellComparator.compareRows(Cell, byte[]).
We have already refactored the firstKeyKv and lastKeyKV as part of other JIRAs.