[jboss-jira] [JBoss JIRA] (DROOLS-4735) [DMN Designer] Grid performance is dire

[Kris Verlaenen (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-4735?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kris Verlaenen updated DROOLS-4735:
-----------------------------------
    Sprint: 2019 Week 44-46 (from Okt 28), 2019 Week 47-49 (from Nov 18)  (was: 2019 Week 44-46 (from Okt 28))


> [DMN Designer] Grid performance is dire
> ---------------------------------------
>
>                 Key: DROOLS-4735
>                 URL: https://issues.jboss.org/browse/DROOLS-4735
>             Project: Drools
>          Issue Type: Bug
>          Components: DMN Editor
>    Affects Versions: 7.29.0.Final
>            Reporter: Michael Anstis
>            Assignee: Michael Anstis
>            Priority: Critical
>              Labels: drools-tools
>
> There have been reports that the performance of the DMN editor's grids does not scale. On examination performance for anything other than simple examples is pretty dire.. something is seriously wrong.
> On closer inspection the following issues were found:
> - Multiple {{NodeMouseDownHandler}}, {{NodeMouseMoveHandler}} and {{NodeMouseUpHandler}} are registered because multiple {{DMNGridLayer}} are (incorrectly) instantiated due to a flaw in {{GridLienzoPanel}} and {{GridLienzoScrollHandler}}.
> - Calls to {{GridWidget.getHeight()}} and {{GridRow.getHeight()}} can be _very_ expensive for due to the dynamic calculation in {{ExpressionEditorGridRow}} and {{LiteralExpressionGridRow}} rows.



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