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From "T Jake Luciani (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-11422) Eliminate temporary object[] allocations in ColumnDefinition::hashCode
Date Fri, 15 Apr 2016 13:38:25 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-11422?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

T Jake Luciani updated CASSANDRA-11422:
---------------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Resolved in CASSANDRA-11428

> Eliminate temporary object[] allocations in ColumnDefinition::hashCode
> ----------------------------------------------------------------------
>
>                 Key: CASSANDRA-11422
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11422
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Core
>            Reporter: Nitsan Wakart
>            Assignee: Nitsan Wakart
>
> ColumnDefinition::hashCode currently calls Objects.hashCode(Object...)
> This triggers the allocation of a short lived Object[] which is not eliminated by EscapeAnalysis.
I have implemented a fix by inlining the hashcode logic and also added a caching hashcode
field. This improved performance on the read workload.
> Fix is available here:
> https://github.com/nitsanw/cassandra/tree/objects-hashcode-fix



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