widgets: Use QList::reserve(), reduces reallocations.

Change-Id: I49cc03f365c77f142f62c8e77505ec09723a44d9
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/widgets/widgets/qsplitter.cpp b/src/widgets/widgets/qsplitter.cpp
index 38773a4fbf..c2081c15f8 100644
--- a/src/widgets/widgets/qsplitter.cpp
+++ b/src/widgets/widgets/qsplitter.cpp
@@ -1502,8 +1502,11 @@ QList<int> QSplitter::sizes() const
     Q_D(const QSplitter);
     ensurePolished();
 
+    const int numSizes = d->list.size();
     QList<int> list;
-    for (int i = 0; i < d->list.size(); ++i) {
+    list.reserve(numSizes);
+
+    for (int i = 0; i < numSizes; ++i) {
         QSplitterLayoutStruct *s = d->list.at(i);
         list.append(d->pick(s->rect.size()));
     }
@@ -1598,8 +1601,10 @@ QByteArray QSplitter::saveState() const
 
     stream << qint32(SplitterMagic);
     stream << qint32(version);
+    const int numSizes = d->list.size();
     QList<int> list;
-    for (int i = 0; i < d->list.size(); ++i) {
+    list.reserve(numSizes);
+    for (int i = 0; i < numSizes; ++i) {
         QSplitterLayoutStruct *s = d->list.at(i);
         list.append(s->sizer);
     }