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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-14826) Small improvement in KVHeap seek() API
Date Tue, 17 Nov 2015 11:37:11 GMT
ramkrishna.s.vasudevan created HBASE-14826:
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             Summary: Small improvement in KVHeap seek() API
                 Key: HBASE-14826
                 URL: https://issues.apache.org/jira/browse/HBASE-14826
             Project: HBase
          Issue Type: Bug
            Reporter: ramkrishna.s.vasudevan


Currently in seek/reseek() APIs we tend to do lot of priorityqueue related operations. We
initially add the current scanner to the heap, then poll and again add the scanner back if
the seekKey is greater than the topkey in that scanner. Since the KVs are always going to
be in increasing order and in ideal scan flow every seek/reseek is followed by a next() call
it should be ok if we start with checking the current scanner and then do a poll to get the
next scanner. Just avoid the initial PQ.add(current) call. This could save some comparisons.




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