diff options
| author | Gunnar Sletta <gunnar@sletta.org> | 2014-09-02 11:49:50 +0200 |
|---|---|---|
| committer | Gunnar Sletta <gunnar@sletta.org> | 2014-09-03 09:16:14 +0200 |
| commit | 0de680c8e8fab36e386dca35e5008ffaa27e8ef6 (patch) | |
| tree | 36ef99752bd8f255d89d9a6f3635655dd857e94e /src/quick/items/qquickitem.h | |
| parent | 978ecab8b5dc20384cb449e05d58293f96722c0e (diff) | |
Fix performance regression caused by SG signals in QQuickItem.
For a testcase with thosands of items, I measured an increase
in shutdown time from 800ms to 7500ms, all spent in disconnect().
This is not acceptible, so we're choosing a different approach.
If items implement a invalidateSceneGraph slot, this function
will be called during shutdown. It should be made a proper virtual
in Qt 6. This approach costs very little.
Change-Id: I5970143cc0a0744955687e17586f0bb00c9afb26
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Diffstat (limited to 'src/quick/items/qquickitem.h')
| -rw-r--r-- | src/quick/items/qquickitem.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/src/quick/items/qquickitem.h b/src/quick/items/qquickitem.h index 0fad96b49b..c17f6a6a7d 100644 --- a/src/quick/items/qquickitem.h +++ b/src/quick/items/qquickitem.h @@ -375,9 +375,6 @@ Q_SIGNALS: void implicitWidthChanged(); void implicitHeightChanged(); - Q_REVISION(2) void sceneGraphInvalidated(); - Q_REVISION(2) void sceneGraphInitialized(); - protected: virtual bool event(QEvent *); |