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From "Yonik Seeley (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3795) Replace spatial contrib module with LSP's spatial-lucene module
Date Wed, 14 Mar 2012 03:29:45 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228922#comment-13228922
] 

Yonik Seeley commented on LUCENE-3795:
--------------------------------------

bq. Surely the JVM can inline the Math.* methods, especially this one.

Inlining yes, but not optimizing (compilers are very restricted in how they can optimize floating
point calculations).
Unfortunately Math.toRadians uses double precision division, which is much more expensive
than multiplication.
I just did a quick test, and Math.toRadians was more than 3 times slower.

I've got most of the changes locally so I'll finish it up...
                
> Replace spatial contrib module with LSP's spatial-lucene module
> ---------------------------------------------------------------
>
>                 Key: LUCENE-3795
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3795
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: modules/spatial
>            Reporter: David Smiley
>            Assignee: David Smiley
>             Fix For: 4.0
>
>
> I propose that Lucene's spatial contrib module be replaced with the spatial-lucene module
within Lucene Spatial Playground (LSP).  LSP has been in development for approximately 1 year
by David Smiley, Ryan McKinley, and Chris Male and we feel it is ready.  LSP is here: http://code.google.com/p/lucene-spatial-playground/
 and the spatial-lucene module is intuitively in svn/trunk/spatial-lucene/.
> I'll add more comments to prevent the issue description from being too long.

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