Speed up value type binding creation

* Avoid calling QMetaType::construct/destruct(typeId, ...) as that requires
  repeated lookups in the type registry. Instead cache the constructor/destructor/etc.
  function addresses in the QQmlValueType singletons as QMetaType
* Allocate memory for the gadget pointer lazily, to accommodate the common case of
  a value type binding by property reference.

Change-Id: I98a3ac73453b8f80027c06401b4f29a9707949d2
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/qml/qml/qqmlvaluetype_p.h b/src/qml/qml/qqmlvaluetype_p.h
index f534fedf5d..be453ae35a 100644
--- a/src/qml/qml/qqmlvaluetype_p.h
+++ b/src/qml/qml/qqmlvaluetype_p.h
@@ -75,8 +75,11 @@ public:
 
 private:
     const QMetaObject *_metaObject;
-    int typeId;
     void *gadgetPtr;
+
+public:
+    int typeId;
+    QMetaType metaType;
 };
 
 class Q_QML_PRIVATE_EXPORT QQmlValueTypeFactory