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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-2762) Use better compiler optimizations by default for native maps
Date Wed, 09 Jul 2014 12:45:06 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-2762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14056187#comment-14056187
] 

Eric Newton commented on ACCUMULO-2762:
---------------------------------------

An even better [explanation | http://dbp-consulting.com/tutorials/StrictAliasing.html].

> Use better compiler optimizations by default for native maps
> ------------------------------------------------------------
>
>                 Key: ACCUMULO-2762
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2762
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: native
>    Affects Versions: 1.5.1, 1.6.0
>            Reporter: Christopher Tubbs
>            Assignee: Christopher Tubbs
>            Priority: Minor
>              Labels: newbie
>             Fix For: 1.5.2, 1.6.1, 1.7.0
>
>         Attachments: ACCUMULO-2762.v1.patch
>
>
> [A comment|https://issues.apache.org/jira/browse/ACCUMULO-2749?focusedCommentId=13985780&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13985780]
on ACCUMULO-2749 identified improved performance with better compiler optimizations for native
maps (-O3 instead of -O2).
> The native shared library is small, and enabling these additional optimizations will
not result in a significantly slower build, so I don't see any reason why we should not enable
better optimizations by default in the Makefile, if we can identify them.



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