Performance improvements

There are two main changes here.  First, where possible, we mark
properties as "IsDirect" which means that they exist in a C++
QMetaObject (as opposed to a dynamic meta object), which allows us
to call QObject::qt_metacall() directly, bypassing any dynamic meta
object stuff.

The second change is to use an ascii string comparator in V8 where
possible.  V8 stores ASCII string internally as ASCII strings, and
asking it to compare them to a UTF16 string requires a conversion.

1 files changed, 20 insertions, 17 deletions

diff --git a/src/declarative/qml/qdeclarativepropertycache_p.h b/src/declarative/qml/qdeclarativepropertycache_p.h
index b97c48b777..69e810aa97 100644
--- a/src/declarative/qml/qdeclarativepropertycache_p.h
+++ b/src/declarative/qml/qdeclarativepropertycache_p.h
@@ -83,27 +83,28 @@ public:
                     NoFlags           = 0x00000000,
 
                     // Can apply to all properties, except IsFunction
-                    IsConstant        = 0x00000001,
-                    IsWritable        = 0x00000002,
-                    IsResettable      = 0x00000004,
-                    IsAlias           = 0x00000008,
-                    IsFinal           = 0x00000010,
+                    IsConstant        = 0x00000001, // Has CONST flag
+                    IsWritable        = 0x00000002, // Has WRITE function
+                    IsResettable      = 0x00000004, // Has RESET function
+                    IsAlias           = 0x00000008, // Is a QML alias to another property
+                    IsFinal           = 0x00000010, // Has FINAL flag
+                    IsDirect          = 0x00000020, // Exists on a C++ QMetaObject
 
                     // These are mutualy exclusive
-                    IsFunction        = 0x00000020,
-                    IsQObjectDerived  = 0x00000040,
-                    IsEnumType        = 0x00000080,
-                    IsQList           = 0x00000100,
-                    IsQmlBinding      = 0x00000200,
-                    IsQScriptValue    = 0x00000400,
-                    IsV8Handle        = 0x00000800,
+                    IsFunction        = 0x00000040, // Is an invokable
+                    IsQObjectDerived  = 0x00000080, // Property type is a QObject* derived type
+                    IsEnumType        = 0x00000100, // Property type is an enum
+                    IsQList           = 0x00000200, // Property type is a QML list
+                    IsQmlBinding      = 0x00000400, // Property type is a QDeclarativeBinding*
+                    IsQScriptValue    = 0x00000800, // Property type is a QScriptValue
+                    IsV8Handle        = 0x00001000, // Property type is a QDeclarativeV8Handle
 
                     // Apply only to IsFunctions
-                    IsVMEFunction     = 0x00001000,
-                    HasArguments      = 0x00002000,
-                    IsSignal          = 0x00004000,
-                    IsVMESignal       = 0x00008000,
-                    IsV8Function      = 0x00010000
+                    IsVMEFunction     = 0x00002000, // Function was added by QML
+                    HasArguments      = 0x00004000, // Function takes arguments
+                    IsSignal          = 0x00008000, // Function is a signal
+                    IsVMESignal       = 0x00010000, // Signal was added by QML
+                    IsV8Function      = 0x00020000  // Function takes QDeclarativeV8Function* args
         };
         Q_DECLARE_FLAGS(Flags, Flag)
 
@@ -113,6 +114,7 @@ public:
         bool isResettable() const { return flags & IsResettable; }
         bool isAlias() const { return flags & IsAlias; }
         bool isFinal() const { return flags & IsFinal; }
+        bool isDirect() const { return flags & IsDirect; }
         bool isFunction() const { return flags & IsFunction; }
         bool isQObject() const { return flags & IsQObjectDerived; }
         bool isEnum() const { return flags & IsEnumType; }
@@ -171,6 +173,7 @@ public:
     static Data *property(QDeclarativeEngine *, QObject *, const QString &, Data &);
     static Data *property(QDeclarativeEngine *, QObject *, const QHashedV8String &, Data &);
 
+    static bool isDynamicMetaObject(const QMetaObject *);
 protected:
     virtual void clear();