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https://issues.apache.org/jira/browse/KYLIN-2944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16213638#comment-16213638
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liyang edited comment on KYLIN-2944 at 10/21/17 1:34 AM:
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Hold on a bit... by creating new objects, the increased GC may impact
performance at all places where the serializers are used. Have we tested the
performance difference at least?
I recall a benchmark where reusing ArrayList vs new ArrayList on every record
yields 5% performance difference.
was (Author: liyang.g...@gmail.com):
Hold on a bit... by creating new objects, the increased GC may impact
performance at all places where the serializers are used. Have we tested the
performance difference at least?
> HLLCSerializer, RawSerializer, PercentileSerializer returns shared object in
> serialize()
> ----------------------------------------------------------------------------------------
>
> Key: KYLIN-2944
> URL: https://issues.apache.org/jira/browse/KYLIN-2944
> Project: Kylin
> Issue Type: Bug
> Reporter: Shaofeng SHI
> Assignee: Shaofeng SHI
> Fix For: v2.2.0
>
>
> This is a bug, which causing incorrect query result. See more in KYLIN-2926
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