QV4::InternalClass: reserve space for transitions.

Profiling of allocations shows that this is one of the most frequent allocators.

Change-Id: Iae0350c61bfe37381577642b9a93064377f45c1d
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

diff --git a/src/qml/jsruntime/qv4internalclass.cpp b/src/qml/jsruntime/qv4internalclass.cpp
index 0f88dd4..c226cea 100644 (file)
--- a/src/qml/jsruntime/qv4internalclass.cpp
+++ b/src/qml/jsruntime/qv4internalclass.cpp
@@ -125,6 +125,7 @@ InternalClass::InternalClass(ExecutionEngine *engine)
     , m_frozen(0)
     , size(0)
 {
+    transitions.reserve(17);
 }
 
 
@@ -140,6 +141,7 @@ InternalClass::InternalClass(const QV4::InternalClass &other)
     , m_frozen(0)
     , size(other.size)
 {
+    transitions.reserve(17);
 }
 
 void InternalClass::changeMember(Object *object, String *string, PropertyAttributes data, uint *index)