You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@calcite.apache.org by "Ted Xu (JIRA)" <ji...@apache.org> on 2018/11/10 06:24:00 UTC

[jira] [Updated] (CALCITE-2619) Reduce string literal creation cost by removing unnecessary charset check

     [ https://issues.apache.org/jira/browse/CALCITE-2619?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Xu updated CALCITE-2619:
----------------------------
    Summary: Reduce string literal creation cost by removing unnecessary charset check  (was: Reduce string literal creation cost by removing charset check)

> Reduce string literal creation cost by removing unnecessary charset check
> -------------------------------------------------------------------------
>
>                 Key: CALCITE-2619
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2619
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: Ted Xu
>            Assignee: Julian Hyde
>            Priority: Major
>
> The cost of creating NlsString is very high, due to its charset check. In some cases, e.g., expression evaluate because of Partition Prune, the NlsString creation costs 40%+ of total executor's overhead.
>  



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)