diff --git a/src/app/application.cpp b/src/app/application.cpp
index 4af731821..1b1bcfb85 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -882,7 +882,7 @@ void Application::createStartupProgressDialog()
     m_startupProgressDialog = new QProgressDialog(tr("Loading torrents..."), tr("Exit"), 0, 100);
     m_startupProgressDialog->setAttribute(Qt::WA_DeleteOnClose);
     m_startupProgressDialog->setWindowFlag(Qt::WindowMinimizeButtonHint);
-    m_startupProgressDialog->setMinimumDuration(0); // Show dialog immediatelly by default
+    m_startupProgressDialog->setMinimumDuration(0); // Show dialog immediately by default
     m_startupProgressDialog->setAutoReset(false);
     m_startupProgressDialog->setAutoClose(false);
 
diff --git a/src/base/bittorrent/sessionimpl.cpp b/src/base/bittorrent/sessionimpl.cpp
index e8e701476..b87828c03 100644
--- a/src/base/bittorrent/sessionimpl.cpp
+++ b/src/base/bittorrent/sessionimpl.cpp
@@ -2908,10 +2908,8 @@ void SessionImpl::generateResumeData()
 void SessionImpl::saveResumeData()
 {
     for (const TorrentImpl *torrent : asConst(m_torrents))
-    {
         torrent->nativeHandle().save_resume_data(lt::torrent_handle::only_if_modified);
-        ++m_numResumeData;
-    }
+    m_numResumeData += m_torrents.size();
 
     // clear queued storage move jobs except the current ongoing one
     if (m_moveStorageQueue.size() > 1)
diff --git a/src/base/net/downloadmanager.cpp b/src/base/net/downloadmanager.cpp
index ac3022c6d..da5c80c43 100644
--- a/src/base/net/downloadmanager.cpp
+++ b/src/base/net/downloadmanager.cpp
@@ -124,7 +124,7 @@ namespace
         // Spoof HTTP Referer to allow adding torrent link from Torcache/KickAssTorrents
         request.setRawHeader("Referer", request.url().toEncoded().data());
 #ifdef QT_NO_COMPRESS
-        // The macro "QT_NO_COMPRESS" defined in QT will disable the zlib releated features
+        // The macro "QT_NO_COMPRESS" defined in QT will disable the zlib related features
         // and reply data auto-decompression in QT will also be disabled. But we can support
         // gzip encoding and manually decompress the reply data.
         request.setRawHeader("Accept-Encoding", "gzip");
diff --git a/src/gui/statusbar.cpp b/src/gui/statusbar.cpp
index 09a6f290a..0f4bda38e 100644
--- a/src/gui/statusbar.cpp
+++ b/src/gui/statusbar.cpp
@@ -48,7 +48,7 @@ StatusBar::StatusBar(QWidget *parent)
 {
 #ifndef Q_OS_MACOS
     // Redefining global stylesheet breaks certain elements on mac like tabs.
-    // Qt checks whether the stylesheet class inherts("QMacStyle") and this becomes false.
+    // Qt checks whether the stylesheet class inherits("QMacStyle") and this becomes false.
     setStyleSheet(u"QStatusBar::item { border-width: 0; }"_qs);
 #endif
 
diff --git a/src/gui/torrentcontenttreeview.cpp b/src/gui/torrentcontenttreeview.cpp
index 984baca52..81a90e2ee 100644
--- a/src/gui/torrentcontenttreeview.cpp
+++ b/src/gui/torrentcontenttreeview.cpp
@@ -79,25 +79,19 @@ void TorrentContentTreeView::keyPressEvent(QKeyEvent *event)
 
     event->accept();
 
-    QModelIndex current = currentNameCell();
-
-    QVariant value = current.data(Qt::CheckStateRole);
+    const QVariant value = currentNameCell().data(Qt::CheckStateRole);
     if (!value.isValid())
     {
         Q_ASSERT(false);
         return;
     }
 
-    Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
-                            ? Qt::Unchecked : Qt::Checked);
-
+    const Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked)
+                                 ? Qt::Unchecked : Qt::Checked;
     const QModelIndexList selection = selectionModel()->selectedRows(TorrentContentModelItem::COL_NAME);
 
     for (const QModelIndex &index : selection)
-    {
-        Q_ASSERT(index.column() == TorrentContentModelItem::COL_NAME);
         model()->setData(index, state, Qt::CheckStateRole);
-    }
 }
 
 void TorrentContentTreeView::renameSelectedFile(BitTorrent::AbstractFileStorage &fileStorage)
@@ -142,16 +136,16 @@ void TorrentContentTreeView::renameSelectedFile(BitTorrent::AbstractFileStorage
     }
 }
 
-QModelIndex TorrentContentTreeView::currentNameCell()
+QModelIndex TorrentContentTreeView::currentNameCell() const
 {
-    QModelIndex current = currentIndex();
+    const QModelIndex current = currentIndex();
     if (!current.isValid())
     {
         Q_ASSERT(false);
         return {};
     }
 
-    return model()->index(current.row(), TorrentContentModelItem::COL_NAME, current.parent());
+    return current.siblingAtColumn(TorrentContentModelItem::COL_NAME);
 }
 
 void TorrentContentTreeView::wheelEvent(QWheelEvent *event)
diff --git a/src/gui/torrentcontenttreeview.h b/src/gui/torrentcontenttreeview.h
index 1e8a5cfa7..f03be6a2f 100644
--- a/src/gui/torrentcontenttreeview.h
+++ b/src/gui/torrentcontenttreeview.h
@@ -49,6 +49,6 @@ public:
     void renameSelectedFile(BitTorrent::AbstractFileStorage &fileStorage);
 
 private:
-    QModelIndex currentNameCell();
+    QModelIndex currentNameCell() const;
     void wheelEvent(QWheelEvent *event) override;
 };
diff --git a/src/gui/transferlistmodel.cpp b/src/gui/transferlistmodel.cpp
index a1a372e30..14c8c4cb8 100644
--- a/src/gui/transferlistmodel.cpp
+++ b/src/gui/transferlistmodel.cpp
@@ -632,9 +632,12 @@ bool TransferListModel::setData(const QModelIndex &index, const QVariant &value,
 
 void TransferListModel::addTorrents(const QVector<BitTorrent::Torrent *> &torrents)
 {
-    int row = m_torrentList.size();
-    beginInsertRows({}, row, (row + torrents.size()));
+    qsizetype row = m_torrentList.size();
+    const qsizetype total = row + torrents.size();
 
+    beginInsertRows({}, row, total);
+
+    m_torrentList.reserve(total);
     for (BitTorrent::Torrent *torrent : torrents)
     {
         Q_ASSERT(!m_torrentMap.contains(torrent));