2 files changed, 6 insertions, 9 deletions
diff --git a/src/network/access/qftp.cpp b/src/network/access/qftp.cpp
index 19b519243c..7b6f830333 100644
--- a/src/network/access/qftp.cpp
+++ b/src/network/access/qftp.cpp
@@ -2034,7 +2034,7 @@ int QFtp::rename(const QString &oldname, const QString &newname)
 */
 int QFtp::rawCommand(const QString &command)
 {
-    QString cmd = command.trimmed() + QLatin1String("\r\n");
+    const QString cmd = QStringRef(&command).trimmed() + QLatin1String("\r\n");
     return d_func()->addCommand(new QFtpCommand(RawCommand, QStringList(cmd)));
 }
 
@@ -2253,8 +2253,8 @@ void QFtpPrivate::_q_startNextCommand()
     // Proxy support, replace the Login argument in place, then fall
     // through.
     if (c->command == QFtp::Login && !proxyHost.isEmpty()) {
-        QString loginString = c->rawCmds.constFirst().trimmed();
-        loginString += QLatin1Char('@') + host;
+        QString loginString;
+        loginString += QStringRef(&c->rawCmds.constFirst()).trimmed() + QLatin1Char('@') + host;
         if (port && port != 21)
             loginString += QLatin1Char(':') + QString::number(port);
         loginString += QLatin1String("\r\n");
diff --git a/src/network/access/qnetworkaccessftpbackend.cpp b/src/network/access/qnetworkaccessftpbackend.cpp
index 153a33f782..d242bdba82 100644
--- a/src/network/access/qnetworkaccessftpbackend.cpp
+++ b/src/network/access/qnetworkaccessftpbackend.cpp
@@ -306,8 +306,6 @@ void QNetworkAccessFtpBackend::ftpDone()
         state = CheckingFeatures;
         if (operation() == QNetworkAccessManager::GetOperation) {
             // send help command to find out if server supports "SIZE" and "MDTM"
-            QString command = url().path();
-            command.prepend(QLatin1String("%1 "));
             helpId = ftp->rawCommand(QLatin1String("HELP")); // get supported commands
         } else {
             ftpDone();
@@ -316,14 +314,13 @@ void QNetworkAccessFtpBackend::ftpDone()
         state = Statting;
         if (operation() == QNetworkAccessManager::GetOperation) {
             // logged in successfully, send the stat requests (if supported)
-            QString command = url().path();
-            command.prepend(QLatin1String("%1 "));
+            const QString path = url().path();
             if (supportsSize) {
                 ftp->rawCommand(QLatin1String("TYPE I"));
-                sizeId = ftp->rawCommand(command.arg(QLatin1String("SIZE"))); // get size
+                sizeId = ftp->rawCommand(QLatin1String("SIZE ") + path); // get size
             }
             if (supportsMdtm)
-                mdtmId = ftp->rawCommand(command.arg(QLatin1String("MDTM"))); // get modified time
+                mdtmId = ftp->rawCommand(QLatin1String("MDTM ") + path); // get modified time
             if (!supportsSize && !supportsMdtm)
                 ftpDone();      // no commands sent, move to the next state
         } else {