2 files changed, 5 insertions, 2 deletions
diff --git a/src/platformsupport/dbustray/qdbustraytypes.cpp b/src/platformsupport/dbustray/qdbustraytypes.cpp
index 7b7d31b7c3..83b5d5da3f 100644
--- a/src/platformsupport/dbustray/qdbustraytypes.cpp
+++ b/src/platformsupport/dbustray/qdbustraytypes.cpp
@@ -82,6 +82,8 @@ QXdgDBusImageVector iconToQXdgDBusImageVector(const QIcon &icon)
         sizes.append(QSize(IconNormalSmallSize * dpr, IconNormalSmallSize * dpr));
     if (!hasMediumIcon)
         sizes.append(QSize(IconNormalMediumSize * dpr, IconNormalMediumSize * dpr));
+
+    ret.reserve(sizes.size());
     foreach (QSize size, sizes) {
         // Protocol specifies ARGB32 format in network byte order
         QImage im = icon.pixmap(size).toImage().convertToFormat(QImage::Format_ARGB32);
diff --git a/src/platformsupport/fbconvenience/qfbscreen.cpp b/src/platformsupport/fbconvenience/qfbscreen.cpp
index 566f84c9ea..d00954375d 100644
--- a/src/platformsupport/fbconvenience/qfbscreen.cpp
+++ b/src/platformsupport/fbconvenience/qfbscreen.cpp
@@ -206,10 +206,11 @@ void QFbScreen::generateRects()
         }
 #endif
     }
-    foreach (const QRect &rect, remainingScreen.rects())
+    const QVector<QRect> remainingScreenRects = remainingScreen.rects();
+    mCachedRects.reserve(mCachedRects.count() + remainingScreenRects.count());
+    foreach (const QRect &rect, remainingScreenRects)
         mCachedRects += QPair<QRect, int>(rect, -1);
     mIsUpToDate = true;
-    return;
 }
 
 QRegion QFbScreen::doRedraw()