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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2014/05/05 12:31:17 UTC
[jira] [Resolved] (LUCENE-5604) Should we switch BytesRefHash to
MurmurHash3?
[ https://issues.apache.org/jira/browse/LUCENE-5604?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless resolved LUCENE-5604.
----------------------------------------
Resolution: Fixed
Fix Version/s: (was: 4.9)
4.8
Woops, yes, thanks for reminding me [~dsmiley]
> Should we switch BytesRefHash to MurmurHash3?
> ---------------------------------------------
>
> Key: LUCENE-5604
> URL: https://issues.apache.org/jira/browse/LUCENE-5604
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.8, 5.0
>
> Attachments: BytesRefHash.perturb.patch, LUCENE-5604.patch, LUCENE-5604.patch, LUCENE-5604.patch
>
>
> MurmurHash3 has better hashing distribution than the current hash function we use for BytesRefHash which is a simple multiplicative function with 31 multiplier (same as Java's String.hashCode, but applied to bytes not chars). Maybe we should switch ...
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