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https://issues.apache.org/jira/browse/IOTDB-4561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17611326#comment-17611326
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Guanfei Guo commented on IOTDB-4561:
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In my PC, with single thread strategy, the computation costs about 10.8
seconds. In contrast, it only costs about 3.7 seconds with multi thread
strategy.
> Improve the RowRecord computing speed in GroupByWithoutValueFilterDataSet by
> multi thread
> -----------------------------------------------------------------------------------------
>
> Key: IOTDB-4561
> URL: https://issues.apache.org/jira/browse/IOTDB-4561
> Project: Apache IoTDB
> Issue Type: Improvement
> Components: Core/Server
> Reporter: Guanfei Guo
> Assignee: Guanfei Guo
> Priority: Critical
> Labels: pull-request-available
> Fix For: 0.13.3
>
>
> In rel/0.13, the computation of a RowRecord in
> GroupByWithoutValueFilterDataSet is a single thread process. In case the
> aggregation result cotaining hundreds of columns, the time for these
> computation is much long (in my PC, about 10.8 seconds), so I use multi
> thread strategy to speed up the computation.
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