You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Earwin Burrfoot (JIRA)" <ji...@apache.org> on 2009/05/05 20:05:30 UTC
[jira] Commented: (LUCENE-1607) String.intern() faster alternative
[ https://issues.apache.org/jira/browse/LUCENE-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706129#action_12706129 ]
Earwin Burrfoot commented on LUCENE-1607:
-----------------------------------------
Bug in previous algo (unbounded hash):
// check cached hashCode first, and use compareTo to avoid
// dynamic type checking in equals().
if (h == other.hashCode() && s.compareTo(other)==0) {
return s; <--- here we should return 'other'
}
> String.intern() faster alternative
> ----------------------------------
>
> Key: LUCENE-1607
> URL: https://issues.apache.org/jira/browse/LUCENE-1607
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Earwin Burrfoot
> Fix For: 2.9
>
> Attachments: intern.patch, LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch
>
>
> By using our own interned string pool on top of default, String.intern() can be greatly optimized.
> On my setup (java 6) this alternative runs ~15.8x faster for already interned strings, and ~2.2x faster for 'new String(interned)'
> For java 5 and 4 speedup is lower, but still considerable.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org