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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-14539) Slight improvement of StoreScanner.optimize
Date Sat, 03 Oct 2015 03:31:26 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl resolved HBASE-14539.
-----------------------------------
      Resolution: Fixed
    Hadoop Flags: Reviewed

Committed to 0.98.x, 1.0.x, 1.1.x, 1.2.x, 1.3, and 2.0.

> 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, 1.2.1, 1.0.3, 1.1.3, 0.98.15
>
>         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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