QmlDesigner.NodeInstances: Render faster

src/plugins/qmldesigner/designercore/instances/graphicsobjectnodeinstance.cpp

@@ -199,7 +199,7 @@ QImage GraphicsObjectNodeInstance::renderImage() const
     QRectF boundingRect = graphicsObject()->boundingRect();
     QSize boundingSize = boundingRect.size().toSize();
 
-    QImage image(boundingSize, QImage::Format_ARGB32_Premultiplied);
+    QImage image(boundingSize, QImage::Format_ARGB32);
 
     if (image.isNull())
         return image;
@@ -219,7 +219,7 @@ QImage GraphicsObjectNodeInstance::renderImage() const
     foreach(QGraphicsItem *graphicsItem, graphicsObject()->childItems())
         paintRecursively(graphicsItem, &painter);
 
-    return image;
+    return image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
 }
 
 void GraphicsObjectNodeInstance::paintRecursively(QGraphicsItem *graphicsItem, QPainter *painter) const

src/plugins/qmldesigner/designercore/instances/nodeinstanceserver.cpp

@@ -1027,7 +1027,7 @@ void NodeInstanceServer::findItemChangesAndSendChangeCommands()
             if (!parentChangedSet.isEmpty())
                 sendChildrenChangedCommand(parentChangedSet.toList());
 
-            if (!m_dirtyInstanceSet.isEmpty() && nodeInstanceClient()->bytesToWrite() < 100000) {
+            if (!m_dirtyInstanceSet.isEmpty() && nodeInstanceClient()->bytesToWrite() < 10000) {
                 nodeInstanceClient()->pixmapChanged(createPixmapChangedCommand(m_dirtyInstanceSet.toList()));
                 m_dirtyInstanceSet.clear();
             }