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Posted to issues@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2015/10/02 08:04:26 UTC

[jira] [Updated] (HBASE-14539) Slight improvement of StoreScanner.optimize

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

Lars Hofhansl updated HBASE-14539:
----------------------------------
    Fix Version/s:     (was: 0.98.12)
                       (was: 1.1.0)
                       (was: 1.0.1)
                   1.1.3
                   1.0.3
                   1.2.1
                   0.98.15
                   1.3.0

> 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, 0.98.15, 1.2.1, 1.0.3, 1.1.3
>
>
> 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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