RFR: 8185886: Improve scrolling performance of TableView and TreeTableView
github.com+6702882+dannygonzalez at openjdk.java.net
Mon Feb 24 08:13:49 UTC 2020
On Sun, 23 Feb 2020 01:05:25 GMT, Nir Lisker <nlisker at openjdk.org> wrote:
>> Optimisation to ExpressionHelper.Generic class to use Sets rather than Arrays to improve listener removal speed.
>> This was due to the removal of listeners in TableView taking up to 50% of CPU time on the JavaFX Application thread when scrolling/adding rows to TableViews.
>> This may alleviate some of the issues seen here:
>> TableView has a horrific performance with many columns #409
>> JDK-8088394 : Huge memory consumption in TableView with too many columns
>> JDK-8166956: JavaFX TreeTableView slow scroll performance
>> JDK-8185887: TableRowSkinBase fails to correctly virtualise cells in horizontal direction
>> OpenJFX mailing list thread: TableView slow vertical scrolling with 300+ columns
> modules/javafx.base/src/main/java/com/sun/javafx/binding/ExpressionHelper.java line 283:
>> 282: final Map<InvalidationListener, Integer> curInvalidationList = new LinkedHashMap<>(invalidationListeners);
>> 283: final Map<ChangeListener<? super T>, Integer> curChangeList = new LinkedHashMap<>(changeListeners);
> You only need the entry set, so you don't need to copy the map, just the set.
Thanks, yes the EntrySet would make more sense here. I'll fix that up.
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