QSortFilterProxyModel: port to PMF connects for performance reasons

BEFORE:
   0.21 msecs per iteration (total: 56, iterations: 256)
   801,946 CPU cycles per iteration (total: 801,946, iterations: 1)

AFTER:
   0.084 msecs per iteration (total: 87, iterations: 1024)
   300,259 CPU cycles per iteration (total: 300,259, iterations: 1)

Change-Id: I5b2703c217bb25e18f1d9f6a1eda19c60e1edcb0
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/benchmarks/corelib/itemmodels/qsortfilterproxymodel/tst_bench_qsortfilterproxymodel.cpp b/tests/benchmarks/corelib/itemmodels/qsortfilterproxymodel/tst_bench_qsortfilterproxymodel.cpp
index 76576fcf69..42017a30ec 100644
--- a/tests/benchmarks/corelib/itemmodels/qsortfilterproxymodel/tst_bench_qsortfilterproxymodel.cpp
+++ b/tests/benchmarks/corelib/itemmodels/qsortfilterproxymodel/tst_bench_qsortfilterproxymodel.cpp
@@ -31,6 +31,7 @@ class tst_QSortFilterProxyModel : public QObject
 private slots:
     void clearFilter_data();
     void clearFilter();
+    void setSourceModel();
 
 private:
     QStringList m_numberList; ///< Cache the strings for efficiency.
@@ -93,6 +94,19 @@ void tst_QSortFilterProxyModel::clearFilter()
     QCOMPARE(proxy.rowCount(), itemCount);
 }
 
+void tst_QSortFilterProxyModel::setSourceModel()
+{
+    QStringListModel model1;
+    QStringListModel model2;
+
+    QSortFilterProxyModel proxy;
+
+    QBENCHMARK {
+        proxy.setSourceModel(&model1);
+        proxy.setSourceModel(&model2);
+    }
+}
+
 QTEST_MAIN(tst_QSortFilterProxyModel)
 
 #include "tst_bench_qsortfilterproxymodel.moc"