fix performance issue with QScriptValue::propertyFlags()

Calling QScriptEngine::toStringHandle() is dead slow, so don't call it;
use JSC::Identifier directly.
This is the same issue as was fixed for setProperty() in commit
a8574172dd5e6bc11cf6f69b6fad5a063549e88d.

1 files changed, 12 insertions, 0 deletions

diff --git a/tests/benchmarks/qscriptvalue/tst_qscriptvalue.cpp b/tests/benchmarks/qscriptvalue/tst_qscriptvalue.cpp
index 904674e..b637591 100644
--- a/tests/benchmarks/qscriptvalue/tst_qscriptvalue.cpp
+++ b/tests/benchmarks/qscriptvalue/tst_qscriptvalue.cpp
@@ -68,6 +68,7 @@ private slots:
     void toQObject();
     void property();
     void setProperty();
+    void propertyFlags();
 };
 
 tst_QScriptValue::tst_QScriptValue()
@@ -189,5 +190,16 @@ void tst_QScriptValue::setProperty()
     }
 }
 
+void tst_QScriptValue::propertyFlags()
+{
+    QScriptEngine engine;
+    QScriptValue obj = engine.newObject();
+    QString propertyName = QString::fromLatin1("foo");
+    obj.setProperty(propertyName, 123, QScriptValue::SkipInEnumeration | QScriptValue::ReadOnly);
+    QBENCHMARK {
+        (void)obj.propertyFlags(propertyName);
+    }
+}
+
 QTEST_MAIN(tst_QScriptValue)
 #include "tst_qscriptvalue.moc"