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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14539) Slight improvement of StoreScanner.optimize
Date Sat, 03 Oct 2015 08:55:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14942193#comment-14942193
] 

Hudson commented on HBASE-14539:
--------------------------------

FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #1094 (See [https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/1094/])
HBASE-14539 Slight improvement of StoreScanner.optimize. (larsh: rev 458d36ff9c7175faa88d6afee4ff9afd099c6c1a)
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java


> Slight improvement of StoreScanner.optimize
> -------------------------------------------
>
>                 Key: HBASE-14539
>                 URL: https://issues.apache.org/jira/browse/HBASE-14539
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Minor
>             Fix For: 2.0.0, 1.3.0, 0.98.15, 1.2.1, 1.0.3, 1.1.3
>
>         Attachments: 14539-0.98.txt
>
>
> While looking at the code I noticed that StoreScanner.optimize does not some unnecessary
work. This is a very tight loop and even just looking up a reference can throw off the CPUs
cache lines. This does safe a few percent of performance (not a lot, though).



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