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Posted to issues@spark.apache.org by "Herman van Hovell (JIRA)" <ji...@apache.org> on 2016/03/23 20:54:25 UTC
[jira] [Resolved] (SPARK-13325) Create a high-quality 64-bit
hashcode expression
[ https://issues.apache.org/jira/browse/SPARK-13325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Herman van Hovell resolved SPARK-13325.
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Resolution: Resolved
Target Version/s: 2.0.0
> Create a high-quality 64-bit hashcode expression
> ------------------------------------------------
>
> Key: SPARK-13325
> URL: https://issues.apache.org/jira/browse/SPARK-13325
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Herman van Hovell
>
> Spark currently lacks a high quality 64-bit hashcode. This is especially useful for the HyperLogLog++ aggregate & potentially other probabilistic datastructures.
> I have been looking at xxHash for a while now, and I'd like to see if we can get the same (stellar) performance in Java/Scala.
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