[infinispan-issues] [JBoss JIRA] (ISPN-3905) Murmurhash3 implementation is slow on String keys

Vittorio Rigamonti (JIRA) issues at jboss.org
Tue Apr 12 10:09:26 EDT 2016


     [ https://issues.jboss.org/browse/ISPN-3905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vittorio Rigamonti updated ISPN-3905:
-------------------------------------
    Fix Version/s: 9.0.0.Alpha2
                       (was: 9.0.0.Alpha1)


> Murmurhash3 implementation is slow on String keys
> -------------------------------------------------
>
>                 Key: ISPN-3905
>                 URL: https://issues.jboss.org/browse/ISPN-3905
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Core
>    Affects Versions: 6.0.0.Final, 6.0.1.Final
>            Reporter: Sanne Grinovero
>            Assignee: Dan Berindei
>            Priority: Minor
>             Fix For: 9.0.0.Alpha2
>
>
> String instances are a common choice for being used as key entries, still the getBytes() operation being performed allocates costly buffers, and the computation to get those bytes looks like expensive too.
> I suspect there might be good reasons for not using the String's own hashcode directly as an input to Murmurhash? Still that's what other implementations seem to do.



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