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-rw-r--r--src/corelib/itemmodels/qstringlistmodel.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/corelib/itemmodels/qstringlistmodel.cpp b/src/corelib/itemmodels/qstringlistmodel.cpp
index dad736b445..b0919c5d78 100644
--- a/src/corelib/itemmodels/qstringlistmodel.cpp
+++ b/src/corelib/itemmodels/qstringlistmodel.cpp
@@ -276,7 +276,9 @@ void QStringListModel::sort(int, Qt::SortOrder order)
QModelIndexList oldList = persistentIndexList();
QModelIndexList newList;
- for (int i = 0; i < oldList.count(); ++i)
+ const int numOldIndexes = oldList.count();
+ newList.reserve(numOldIndexes);
+ for (int i = 0; i < numOldIndexes; ++i)
newList.append(index(forwarding.at(oldList.at(i).row()), 0));
changePersistentIndexList(oldList, newList);