diff --git a/src/encoder/encoderfdkaac.cpp b/src/encoder/encoderfdkaac.cpp
index bce82a19d81..754075fe097 100644
--- a/src/encoder/encoderfdkaac.cpp
+++ b/src/encoder/encoderfdkaac.cpp
@@ -187,13 +187,12 @@ QString EncoderFdkAac::buttWindowsFdkAac() {
 
         // Typical name for a butt installation folder
         // is "butt-x.x.x" so list subfolders beginning with "butt"
-        QStringList nameFilters("butt*");
-        QStringList subfolders =
-                folder.entryList(nameFilters, QDir::Dirs, QDir::Name);
+        const QStringList subfolders =
+                folder.entryList(QStringList{"butt*"}, QDir::Dirs, QDir::Name);
 
         // If a butt installation is found, try
         // to find libfdk-aac in it
-        for (const auto& subName : qAsConst(subfolders)) {
+        for (const auto& subName : subfolders) {
             if (!folder.cd(subName)) {
                 continue;
             }
diff --git a/src/util/font.h b/src/util/font.h
index f306991724e..42bb21f4701 100644
--- a/src/util/font.h
+++ b/src/util/font.h
@@ -53,21 +53,23 @@ class FontUtils {
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
             QFontDatabase database;
 #endif
-            QStringList families = QFontDatabase::applicationFontFamilies(result);
-            foreach (const QString& family, families) {
+            QStringList pointSizesStr;
+            const QStringList families = QFontDatabase::applicationFontFamilies(result);
+            for (const QString& family : families) {
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-                QStringList styles = QFontDatabase::styles(family);
+                const QStringList styles = QFontDatabase::styles(family);
 #else
-                QStringList styles = database.styles(family);
+                const QStringList styles = database.styles(family);
 #endif
-                foreach (const QString& style, styles) {
+                for (const QString& style : styles) {
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-                    QList<int> pointSizes = QFontDatabase::pointSizes(family, style);
+                    const QList<int> pointSizes = QFontDatabase::pointSizes(family, style);
 #else
-                    QList<int> pointSizes = database.pointSizes(family, style);
+                    const QList<int> pointSizes = database.pointSizes(family, style);
 #endif
-                    QStringList pointSizesStr;
-                    foreach (int point, pointSizes) {
+                    pointSizesStr.clear();
+                    pointSizesStr.reserve(pointSizes.count());
+                    for (int point : pointSizes) {
                         pointSizesStr.append(QString::number(point));
                     }
                     qDebug() << "FONT LOADED family:" << family
diff --git a/src/widget/weffectchainpresetbutton.cpp b/src/widget/weffectchainpresetbutton.cpp
index e33e46809ff..4026ffc181f 100644
--- a/src/widget/weffectchainpresetbutton.cpp
+++ b/src/widget/weffectchainpresetbutton.cpp
@@ -54,6 +54,7 @@ void WEffectChainPresetButton::populateMenu() {
     // Chain preset items
     const EffectsBackendManagerPointer bem = m_pEffectsManager->getBackendManager();
     bool presetIsReadOnly = true;
+    QStringList effectNames;
     for (const auto& pChainPreset : m_pChainPresetManager->getPresetsSorted()) {
         QString title = pChainPreset->name();
         if (title == m_pChain->presetName()) {
@@ -63,7 +64,6 @@ void WEffectChainPresetButton::populateMenu() {
         }
         QString tooltip =
                 QStringLiteral("<b>") + pChainPreset->name() + QStringLiteral("</b>");
-        QStringList effectNames;
         for (const auto& pEffectPreset : pChainPreset->effectPresets()) {
             if (!pEffectPreset->isEmpty()) {
                 effectNames.append(bem->getDisplayNameForEffectPreset(pEffectPreset));
@@ -73,6 +73,7 @@ void WEffectChainPresetButton::populateMenu() {
             tooltip.append("<br/>");
             tooltip.append(effectNames.join("<br/>"));
         }
+        effectNames.clear();
         parented_ptr<QAction> pAction = make_parented<QAction>(title, this);
         connect(pAction,
                 &QAction::triggered,
diff --git a/src/widget/weffectchainpresetselector.cpp b/src/widget/weffectchainpresetselector.cpp
index 49b033c9e20..bfed3191968 100644
--- a/src/widget/weffectchainpresetselector.cpp
+++ b/src/widget/weffectchainpresetselector.cpp
@@ -75,6 +75,7 @@ void WEffectChainPresetSelector::populate() {
     }
 
     const EffectsBackendManagerPointer bem = m_pEffectsManager->getBackendManager();
+    QStringList effectNames;
     for (int i = 0; i < presetList.size(); i++) {
         auto pChainPreset = presetList.at(i);
         QString elidedDisplayName = metrics.elidedText(pChainPreset->name(),
@@ -83,7 +84,6 @@ void WEffectChainPresetSelector::populate() {
         addItem(elidedDisplayName, QVariant(pChainPreset->name()));
         QString tooltip =
                 QStringLiteral("<b>") + pChainPreset->name() + QStringLiteral("</b>");
-        QStringList effectNames;
         for (const auto& pEffectPreset : pChainPreset->effectPresets()) {
             if (!pEffectPreset->isEmpty()) {
                 effectNames.append(bem->getDisplayNameForEffectPreset(pEffectPreset));
@@ -93,6 +93,7 @@ void WEffectChainPresetSelector::populate() {
             tooltip.append("<br/>");
             tooltip.append(effectNames.join("<br/>"));
         }
+        effectNames.clear();
         setItemData(i, tooltip, Qt::ToolTipRole);
     }