1 files changed, 356 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/kernel/qvariant/tst_bench_qvariant.cpp b/tests/benchmarks/corelib/kernel/qvariant/tst_bench_qvariant.cpp
new file mode 100644
index 0000000000..8b2e10c125
--- /dev/null
+++ b/tests/benchmarks/corelib/kernel/qvariant/tst_bench_qvariant.cpp
@@ -0,0 +1,356 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QtCore>
+#ifdef QT_GUI_LIB
+#  include <QtGui/QPixmap>
+#endif
+#include <qtest.h>
+
+#define ITERATION_COUNT 1e5
+
+class tst_QVariant : public QObject
+{
+    Q_OBJECT
+
+public:
+    enum ABenchmarkEnum {
+        FirstEnumValue,
+        SecondEnumValue,
+        ThirdEnumValue
+    };
+    Q_ENUM(ABenchmarkEnum)
+
+private slots:
+    void testBound();
+
+    void doubleVariantCreation();
+    void floatVariantCreation();
+    void rectVariantCreation();
+    void stringVariantCreation();
+#ifdef QT_GUI_LIB
+    void pixmapVariantCreation();
+#endif
+    void stringListVariantCreation();
+    void bigClassVariantCreation();
+    void smallClassVariantCreation();
+    void enumVariantCreation();
+
+    void doubleVariantSetValue();
+    void floatVariantSetValue();
+    void rectVariantSetValue();
+    void stringVariantSetValue();
+    void stringListVariantSetValue();
+    void bigClassVariantSetValue();
+    void smallClassVariantSetValue();
+    void enumVariantSetValue();
+
+    void doubleVariantAssignment();
+    void floatVariantAssignment();
+    void rectVariantAssignment();
+    void stringVariantAssignment();
+    void stringListVariantAssignment();
+
+    void doubleVariantValue();
+    void floatVariantValue();
+    void rectVariantValue();
+    void stringVariantValue();
+
+    void createCoreType_data();
+    void createCoreType();
+    void createCoreTypeCopy_data();
+    void createCoreTypeCopy();
+};
+
+struct BigClass
+{
+    double n,i,e,r,o,b;
+};
+static_assert(sizeof(BigClass) > sizeof(QVariant::Private::MaxInternalSize));
+QT_BEGIN_NAMESPACE
+Q_DECLARE_TYPEINFO(BigClass, Q_RELOCATABLE_TYPE);
+QT_END_NAMESPACE
+Q_DECLARE_METATYPE(BigClass);
+
+struct SmallClass
+{
+    char s;
+};
+static_assert(sizeof(SmallClass) <= sizeof(QVariant::Private::MaxInternalSize));
+QT_BEGIN_NAMESPACE
+Q_DECLARE_TYPEINFO(SmallClass, Q_RELOCATABLE_TYPE);
+QT_END_NAMESPACE
+Q_DECLARE_METATYPE(SmallClass);
+
+void tst_QVariant::testBound()
+{
+    qreal d = qreal(.5);
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            d = qBound<qreal>(0, d, 1);
+        }
+    }
+}
+
+template <typename T>
+static void variantCreation(T val)
+{
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            QVariant v(val);
+        }
+    }
+}
+
+template <>
+void variantCreation<BigClass>(BigClass val)
+{
+    QBENCHMARK {
+        for (int i = 0; i < ITERATION_COUNT; ++i) {
+            QVariant::fromValue(val);
+        }
+    }
+}
+
+template <>
+void variantCreation<SmallClass>(SmallClass val)
+{
+    QBENCHMARK {
+        for (int i = 0; i < ITERATION_COUNT; ++i) {
+            QVariant::fromValue(val);
+        }
+    }
+}
+
+template <>
+void variantCreation<tst_QVariant::ABenchmarkEnum>(tst_QVariant::ABenchmarkEnum val)
+{
+    QBENCHMARK {
+        for (int i = 0; i < ITERATION_COUNT; ++i) {
+            QVariant::fromValue(val);
+        }
+    }
+}
+
+
+void tst_QVariant::doubleVariantCreation()
+{
+    variantCreation<double>(0.0);
+}
+
+void tst_QVariant::floatVariantCreation()
+{
+    variantCreation<float>(0.0f);
+}
+
+void tst_QVariant::rectVariantCreation()
+{
+    variantCreation<QRect>(QRect(1, 2, 3, 4));
+}
+
+void tst_QVariant::stringVariantCreation()
+{
+    variantCreation<QString>(QString());
+}
+
+#ifdef QT_GUI_LIB
+void tst_QVariant::pixmapVariantCreation()
+{
+    variantCreation<QPixmap>(QPixmap());
+}
+#endif
+
+void tst_QVariant::stringListVariantCreation()
+{
+    variantCreation<QStringList>(QStringList());
+}
+
+void tst_QVariant::bigClassVariantCreation()
+{
+    variantCreation<BigClass>(BigClass());
+}
+
+void tst_QVariant::smallClassVariantCreation()
+{
+    variantCreation<SmallClass>(SmallClass());
+}
+
+void tst_QVariant::enumVariantCreation()
+{
+    variantCreation<ABenchmarkEnum>(FirstEnumValue);
+}
+
+
+template <typename T>
+static void variantSetValue(T d)
+{
+    QVariant v;
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v.setValue(d);
+        }
+    }
+}
+
+void tst_QVariant::doubleVariantSetValue()
+{
+    variantSetValue<double>(0.0);
+}
+
+void tst_QVariant::floatVariantSetValue()
+{
+    variantSetValue<float>(0.0f);
+}
+
+void tst_QVariant::rectVariantSetValue()
+{
+    variantSetValue<QRect>(QRect());
+}
+
+void tst_QVariant::stringVariantSetValue()
+{
+    variantSetValue<QString>(QString());
+}
+
+void tst_QVariant::stringListVariantSetValue()
+{
+    variantSetValue<QStringList>(QStringList());
+}
+
+void tst_QVariant::bigClassVariantSetValue()
+{
+    variantSetValue<BigClass>(BigClass());
+}
+
+void tst_QVariant::smallClassVariantSetValue()
+{
+    variantSetValue<SmallClass>(SmallClass());
+}
+
+void tst_QVariant::enumVariantSetValue()
+{
+    variantSetValue<ABenchmarkEnum>(FirstEnumValue);
+}
+
+template <typename T>
+static void variantAssignment(T d)
+{
+    QVariant v;
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v = d;
+        }
+    }
+}
+
+void tst_QVariant::doubleVariantAssignment()
+{
+    variantAssignment<double>(0.0);
+}
+
+void tst_QVariant::floatVariantAssignment()
+{
+    variantAssignment<float>(0.0f);
+}
+
+void tst_QVariant::rectVariantAssignment()
+{
+    variantAssignment<QRect>(QRect());
+}
+
+void tst_QVariant::stringVariantAssignment()
+{
+    variantAssignment<QString>(QString());
+}
+
+void tst_QVariant::stringListVariantAssignment()
+{
+    variantAssignment<QStringList>(QStringList());
+}
+
+void tst_QVariant::doubleVariantValue()
+{
+    QVariant v(0.0);
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v.toDouble();
+        }
+    }
+}
+
+void tst_QVariant::floatVariantValue()
+{
+    QVariant v(0.0f);
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v.toFloat();
+        }
+    }
+}
+
+void tst_QVariant::rectVariantValue()
+{
+    QVariant v(QRect(1,2,3,4));
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v.toRect();
+        }
+    }
+}
+
+void tst_QVariant::stringVariantValue()
+{
+    QVariant v = QString();
+    QBENCHMARK {
+        for(int i = 0; i < ITERATION_COUNT; ++i) {
+            v.toString();
+        }
+    }
+}
+
+void tst_QVariant::createCoreType_data()
+{
+    QTest::addColumn<int>("typeId");
+    for (int i = QMetaType::FirstCoreType; i <= QMetaType::LastCoreType; ++i) {
+        if (QMetaType metaType(i); metaType.isValid()) // QMetaType(27) does not exist
+            QTest::newRow(metaType.name()) << i;
+    }
+}
+
+// Tests how fast a Qt core type can be default-constructed by a
+// QVariant. The purpose of this benchmark is to measure the overhead
+// of creating (and destroying) a QVariant compared to creating the
+// type directly.
+void tst_QVariant::createCoreType()
+{
+    QFETCH(int, typeId);
+    QBENCHMARK {
+        for (int i = 0; i < ITERATION_COUNT; ++i)
+            QVariant(QMetaType(typeId));
+    }
+}
+
+void tst_QVariant::createCoreTypeCopy_data()
+{
+    createCoreType_data();
+}
+
+// Tests how fast a Qt core type can be copy-constructed by a
+// QVariant. The purpose of this benchmark is to measure the overhead
+// of creating (and destroying) a QVariant compared to creating the
+// type directly.
+void tst_QVariant::createCoreTypeCopy()
+{
+    QFETCH(int, typeId);
+    QMetaType metaType(typeId);
+    QVariant other(metaType);
+    const void *copy = other.constData();
+    QBENCHMARK {
+        for (int i = 0; i < ITERATION_COUNT; ++i)
+            QVariant(metaType, copy);
+    }
+}
+
+QTEST_MAIN(tst_QVariant)
+
+#include "tst_bench_qvariant.moc"