QWidget{Text,Line}Control: reserve() a vector

Reduces reallocation overhead.

Change-Id: Ibbb5d6257f78e7f9668b8c7f17aa498f6d4994d3
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/widgets/widgets/qwidgettextcontrol.cpp b/src/widgets/widgets/qwidgettextcontrol.cpp
index a46abf374d..22d199fc74 100644
--- a/src/widgets/widgets/qwidgettextcontrol.cpp
+++ b/src/widgets/widgets/qwidgettextcontrol.cpp
@@ -2030,6 +2030,7 @@ void QWidgetTextControlPrivate::inputMethodEvent(QInputMethodEvent *e)
     if (isGettingInput)
         layout->setPreeditArea(cursor.position() - block.position(), e->preeditString());
     QVector<QTextLayout::FormatRange> overrides;
+    overrides.reserve(e->attributes().size());
     const int oldPreeditCursor = preeditCursor;
     preeditCursor = e->preeditString().length();
     hideCursor = false;