[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 Attachments: aTable.dmn, dtable-500-rows.dmn, edit-cell.webm 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. h2. Manual Acceptance test Environment: wildfly14 with following memory settings: {{JAVA_OPTS="-Xms64m -Xmx1024m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=1024m -Djava.net.preferIPv4Stack=true"}} h3. GDT - Merge view (/) - Pinned mode (/) - Change column width, save and reopen (/) - Search the table (/) - Scroll the table (/) - Edit the cell (/) - Reorder columns (/) - Reorder rows (/) h3. DMN decision table - Save and reopen (x) not able to save in reasonable time - Change column width (/) - Search the grid (/) - Scroll the grid (/) - Reorder columns (/) - Reorder rows (/) - Adding column (/) - Removing column (/) - Edit the cell (x) not able to invoke edit mode by double click, if the table was scrolled [^edit-cell.webm]