QMimeData: replace an inefficient QList with a QVector

QMimeDataStruct is larger than a pointer, so holding it in a
QList is horribly inefficient.

Fix by marking as movable and holding in a QVector instead.

Change-Id: If285dd31546066db0b240ea0d4d30668f50b5f2c
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/corelib/kernel/qmimedata.cpp b/src/corelib/kernel/qmimedata.cpp
index 3f2cd5a36a..f5057bc5f0 100644
--- a/src/corelib/kernel/qmimedata.cpp
+++ b/src/corelib/kernel/qmimedata.cpp
@@ -53,6 +53,7 @@ struct QMimeDataStruct
     QString format;
     QVariant data;
 };
+Q_DECLARE_TYPEINFO(QMimeDataStruct, Q_MOVABLE_TYPE);
 
 class QMimeDataPrivate : public QObjectPrivate
 {
@@ -64,7 +65,7 @@ public:
 
     QVariant retrieveTypedData(const QString &format, QVariant::Type type) const;
 
-    QList<QMimeDataStruct> dataList;
+    QVector<QMimeDataStruct> dataList;
 };
 
 void QMimeDataPrivate::removeData(const QString &format)