Optimize Arguments Object

Avoid creation of the Array in most cases. Fix FunctionObject::method_apply
so that it correctly recognizes this case and does the right thing.
Add a getLength() method to ArgumentsObject to speed up the lookup of that
property.

Improves the RayTrace benchmark by around 15%.

Change-Id: I53eb34a1f9515e59a191ee6f0eb23a3f4c6882d1
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4argumentsobject_p.h b/src/qml/jsruntime/qv4argumentsobject_p.h
index 37a8d0a94a..0a2ea3b42a 100644
--- a/src/qml/jsruntime/qv4argumentsobject_p.h
+++ b/src/qml/jsruntime/qv4argumentsobject_p.h
@@ -132,8 +132,10 @@ struct ArgumentsObject: Object {
     static bool deleteIndexedProperty(Managed *m, uint index);
     static PropertyAttributes queryIndexed(const Managed *m, uint index);
     static void markObjects(Heap::Base *that, ExecutionEngine *e);
+    static uint getLength(const Managed *m);
 
     void fullyCreate();
+
 };
 
 }