diff --git a/src/libs/advanceddockingsystem/dockcontainerwidget.cpp b/src/libs/advanceddockingsystem/dockcontainerwidget.cpp
index f2e2b6b2063..0e283fcbc64 100644
--- a/src/libs/advanceddockingsystem/dockcontainerwidget.cpp
+++ b/src/libs/advanceddockingsystem/dockcontainerwidget.cpp
@@ -16,6 +16,7 @@
 #include "floatingdockcontainer.h"
 
 #include <QAbstractButton>
+#include <QCoreApplication>
 #include <QDebug>
 #include <QGridLayout>
 #include <QList>
diff --git a/src/libs/utils/id.cpp b/src/libs/utils/id.cpp
index 45e42708288..2f0bdbd4eea 100644
--- a/src/libs/utils/id.cpp
+++ b/src/libs/utils/id.cpp
@@ -82,7 +82,7 @@ static QHash<quintptr, StringHolder> stringFromId;
 static IdCache idFromString;
 static QReadWriteLock s_cacheMutex;
 
-static quintptr theId(const char *str, int n = 0)
+static quintptr theId(const char *str, int n)
 {
     QTC_ASSERT(str && *str, return 0);
     StringHolder sh(str, n);
@@ -107,11 +107,6 @@ static quintptr theId(const char *str, int n = 0)
     return res;
 }
 
-static quintptr theId(const QByteArray &ba)
-{
-    return theId(ba.constData(), ba.size());
-}
-
 /*!
     \fn Utils::Id::Id(quintptr uid)
     \internal
@@ -181,11 +176,12 @@ Key Id::toKey() const
   \sa toString(), fromSetting()
 */
 
-Id Id::fromString(const QString &name)
+Id Id::fromString(const QStringView name)
 {
     if (name.isEmpty())
         return Id();
-    return Id(theId(name.toUtf8()));
+    const QByteArray ba = name.toUtf8();
+    return Id(theId(ba.data(), ba.size()));
 }
 
 /*!
@@ -199,9 +195,9 @@ Id Id::fromString(const QString &name)
   \sa toString(), fromSetting()
 */
 
-Id Id::fromName(const QByteArray &name)
+Id Id::fromName(const QByteArrayView name)
 {
-    return Id(theId(name));
+    return Id(theId(name.data(), name.size()));
 }
 
 /*!
@@ -228,7 +224,7 @@ Id Id::fromSetting(const QVariant &variant)
     const QByteArray ba = variant.toString().toUtf8();
     if (ba.isEmpty())
         return Id();
-    return Id(theId(ba));
+    return Id(theId(ba.data(), ba.size()));
 }
 
 QSet<Id> Id::fromStringList(const QStringList &list)
@@ -252,7 +248,7 @@ QStringList Id::toStringList(const QSet<Id> &ids)
 Id Id::withSuffix(int suffix) const
 {
     const QByteArray ba = name() + QByteArray::number(suffix);
-    return Id(ba.constData());
+    return Id(theId(ba.data(), ba.size()));
 }
 
 /*!
@@ -262,17 +258,17 @@ Id Id::withSuffix(int suffix) const
 Id Id::withSuffix(const char *suffix) const
 {
     const QByteArray ba = name() + suffix;
-    return Id(ba.constData());
+    return Id(theId(ba.data(), ba.size()));
 }
 
 /*!
   \overload
 */
 
-Id Id::withSuffix(const QString &suffix) const
+Id Id::withSuffix(const QStringView suffix) const
 {
     const QByteArray ba = name() + suffix.toUtf8();
-    return Id(ba.constData());
+    return Id(theId(ba.data(), ba.size()));
 }
 
 /*!
@@ -286,10 +282,9 @@ Id Id::withSuffix(const QString &suffix) const
 Id Id::withPrefix(const char *prefix) const
 {
     const QByteArray ba = prefix + name();
-    return Id(ba.constData());
+    return Id(theId(ba.data(), ba.size()));
 }
 
-
 bool Id::operator==(const char *name) const
 {
     QReadLocker lock(&s_cacheMutex);
diff --git a/src/libs/utils/id.h b/src/libs/utils/id.h
index 62b70353450..4b18736d5cf 100644
--- a/src/libs/utils/id.h
+++ b/src/libs/utils/id.h
@@ -29,7 +29,7 @@ public:
 
     Id withSuffix(int suffix) const;
     Id withSuffix(const char *suffix) const;
-    Id withSuffix(const QString &suffix) const;
+    Id withSuffix(const QStringView suffix) const;
     Id withPrefix(const char *prefix) const;
 
     QByteArray name() const;
@@ -47,8 +47,8 @@ public:
     bool alphabeticallyBefore(Id other) const;
 
     quintptr uniqueIdentifier() const { return m_id; } // Avoid.
-    static Id fromString(const QString &str); // FIXME: avoid.
-    static Id fromName(const QByteArray &ba); // FIXME: avoid.
+    static Id fromString(const QStringView str); // FIXME: avoid.
+    static Id fromName(const QByteArrayView ba); // FIXME: avoid.
     static Id fromSetting(const QVariant &variant); // Good to use.
 
     static QSet<Id> fromStringList(const QStringList &list);
diff --git a/src/plugins/android/androiddevice.cpp b/src/plugins/android/androiddevice.cpp
index cc824e1343a..25b9444a7a4 100644
--- a/src/plugins/android/androiddevice.cpp
+++ b/src/plugins/android/androiddevice.cpp
@@ -441,12 +441,12 @@ AndroidDeviceInfo AndroidDevice::androidDeviceInfoFromIDevice(const IDevice *dev
 Id AndroidDevice::idFromDeviceInfo(const AndroidDeviceInfo &info)
 {
     const QString id = (info.type == IDevice::Hardware ? info.serialNumber : info.avdName);
-    return  Id(Constants::ANDROID_DEVICE_ID).withSuffix(':' + id);
+    return  Id(Constants::ANDROID_DEVICE_ID).withSuffix(':').withSuffix(id);
 }
 
 Id AndroidDevice::idFromAvdInfo(const CreateAvdInfo &info)
 {
-    return Id(Constants::ANDROID_DEVICE_ID).withSuffix(':' + info.name);
+    return Id(Constants::ANDROID_DEVICE_ID).withSuffix(':').withSuffix(info.name);
 }
 
 QStringList AndroidDevice::supportedAbis() const
@@ -650,10 +650,10 @@ static void handleDevicesListChange(const QString &serialNumber)
 
     if (isEmulator) {
         const QString avdName = emulatorName(serial);
-        const Id avdId = Id(Constants::ANDROID_DEVICE_ID).withSuffix(':' + avdName);
+        const Id avdId = Id(Constants::ANDROID_DEVICE_ID).withSuffix(':').withSuffix(avdName);
         devMgr->setDeviceState(avdId, state);
     } else {
-        const Id id = Id(Constants::ANDROID_DEVICE_ID).withSuffix(':' + serial);
+        const Id id = Id(Constants::ANDROID_DEVICE_ID).withSuffix(':').withSuffix(serial);
         QString displayName = AndroidConfig::getProductModel(serial);
         // Check if the device is connected via WiFi. A sample serial of such devices can be
         // like: "192.168.1.190:5555"
diff --git a/src/plugins/boot2qt/device-detection/devicedetector.cpp b/src/plugins/boot2qt/device-detection/devicedetector.cpp
index bc4fbcee665..60e71def4ad 100644
--- a/src/plugins/boot2qt/device-detection/devicedetector.cpp
+++ b/src/plugins/boot2qt/device-detection/devicedetector.cpp
@@ -75,8 +75,9 @@ void DeviceDetector::handleDeviceEvent(QdbDeviceTracker::DeviceEventType eventTy
         return;
     }
 
-    const Utils::Id deviceId = Constants::QdbHardwareDevicePrefix.withSuffix(':' + serial);
-    const auto messagePrefix = Tr::tr("Device \"%1\" %2").arg(serial);
+    const Utils::Id deviceId =
+            Utils::Id(Constants::QdbHardwareDevicePrefix).withSuffix(':').withSuffix(serial);
+    const QString messagePrefix = Tr::tr("Device \"%1\" %2").arg(serial);
     DeviceManager * const dm = DeviceManager::instance();
 
     if (eventType == QdbDeviceTracker::NewDevice) {
diff --git a/src/plugins/boot2qt/qdbconstants.h b/src/plugins/boot2qt/qdbconstants.h
index 40bdd4a5272..690b2fb3e07 100644
--- a/src/plugins/boot2qt/qdbconstants.h
+++ b/src/plugins/boot2qt/qdbconstants.h
@@ -16,7 +16,7 @@ const char QdbDeployConfigurationId[] = "Qt4ProjectManager.Qdb.QdbDeployConfigur
 const char QdbStopApplicationStepId[] = "Qdb.StopApplicationStep";
 const char QdbMakeDefaultAppStepId[] = "Qdb.MakeDefaultAppStep";
 
-const Utils::Id QdbHardwareDevicePrefix = "QdbHardwareDevice";
+const char QdbHardwareDevicePrefix[] = "QdbHardwareDevice";
 const char AppcontrollerFilepath[] = "/usr/bin/appcontroller";
 
 } // namespace Constants
diff --git a/src/plugins/coreplugin/progressmanager/processprogress.cpp b/src/plugins/coreplugin/progressmanager/processprogress.cpp
index e3769f54ca9..357b0846f64 100644
--- a/src/plugins/coreplugin/progressmanager/processprogress.cpp
+++ b/src/plugins/coreplugin/progressmanager/processprogress.cpp
@@ -97,7 +97,7 @@ ProcessProgress::ProcessProgress(Process *process)
         d->m_futureInterface.reportStarted();
 
         const QString name = d->displayName();
-        const auto id = Id::fromString(name + ".action");
+        const Id id = Id::fromString(name).withSuffix(".action");
         if (d->m_parser) {
             d->m_futureProgress = ProgressManager::addTask(d->m_futureInterface.future(), name, id);
         } else {
diff --git a/src/plugins/coreplugin/progressmanager/taskprogress.cpp b/src/plugins/coreplugin/progressmanager/taskprogress.cpp
index 72838aef90f..bfdbe727541 100644
--- a/src/plugins/coreplugin/progressmanager/taskprogress.cpp
+++ b/src/plugins/coreplugin/progressmanager/taskprogress.cpp
@@ -120,7 +120,7 @@ TaskProgress::TaskProgress(TaskTree *taskTree)
         d->m_futureInterface.reportStarted();
         d->advanceProgress(0);
 
-        const Id id = d->m_id.isValid() ? d->m_id : Id::fromString(d->m_displayName + ".action");
+        const Id id = d->m_id.isValid() ? d->m_id : Id::fromString(d->m_displayName).withSuffix(".action");
         d->m_futureProgress = ProgressManager::addTask(d->m_futureInterface.future(),
                                                        d->m_displayName, id);
         d->m_futureProgress->setKeepOnFinish(d->m_keep);
diff --git a/src/plugins/gitlab/gitlabclonedialog.cpp b/src/plugins/gitlab/gitlabclonedialog.cpp
index ae5390e941b..2eaae7cda21 100644
--- a/src/plugins/gitlab/gitlabclonedialog.cpp
+++ b/src/plugins/gitlab/gitlabclonedialog.cpp
@@ -133,7 +133,7 @@ void GitLabCloneDialog::updateUi()
 void GitLabCloneDialog::cloneProject()
 {
     VersionControlBase *vc = static_cast<VersionControlBase *>(
-                Core::VcsManager::versionControl(Id::fromString("G.Git")));
+                Core::VcsManager::versionControl(Id("G.Git")));
     QTC_ASSERT(vc, return);
     const QStringList extraArgs = m_submodulesCB->isChecked() ? QStringList{ "--recursive" }
                                                               : QStringList{};
diff --git a/src/plugins/lua/bindings/fetch.cpp b/src/plugins/lua/bindings/fetch.cpp
index f998db4f536..e59538a7a19 100644
--- a/src/plugins/lua/bindings/fetch.cpp
+++ b/src/plugins/lua/bindings/fetch.cpp
@@ -204,7 +204,7 @@ void addFetchModule()
             }
 
             Utils::InfoBarEntry entry{
-                Utils::Id::fromString("Fetch" + pluginName),
+                Utils::Id("Fetch").withSuffix(pluginName),
                 Tr::tr("Allow the extension \"%1\" to fetch data from the internet?")
                     .arg(pluginName)};
             entry.setDetailsWidgetCreator([pluginName, url] {
@@ -221,16 +221,16 @@ void addFetchModule()
             });
             entry.addCustomButton(Tr::tr("Always Allow"), [mod, pluginName, fetch]() {
                 mod->setAllowedToFetch(pluginName, Module::IsAllowed::Yes);
-                Core::ICore::infoBar()->removeInfo(Utils::Id::fromString("Fetch" + pluginName));
+                Core::ICore::infoBar()->removeInfo(Utils::Id("Fetch").withSuffix(pluginName));
                 fetch();
             });
             entry.addCustomButton(Tr::tr("Allow Once"), [pluginName, fetch]() {
-                Core::ICore::infoBar()->removeInfo(Utils::Id::fromString("Fetch" + pluginName));
+                Core::ICore::infoBar()->removeInfo(Utils::Id("Fetch").withSuffix(pluginName));
                 fetch();
             });
 
             entry.setCancelButtonInfo(Tr::tr("Deny"), [mod, notAllowed, pluginName]() {
-                Core::ICore::infoBar()->removeInfo(Utils::Id::fromString("Fetch" + pluginName));
+                Core::ICore::infoBar()->removeInfo(Utils::Id("Fetch").withSuffix(pluginName));
                 mod->setAllowedToFetch(pluginName, Module::IsAllowed::No);
                 notAllowed();
             });
diff --git a/src/plugins/lua/bindings/install.cpp b/src/plugins/lua/bindings/install.cpp
index a5e77d1e521..a2123f3d8aa 100644
--- a/src/plugins/lua/bindings/install.cpp
+++ b/src/plugins/lua/bindings/install.cpp
@@ -351,8 +351,9 @@ void addInstallModule()
                         return;
                     }
 
-                    const Utils::Id infoBarId = Utils::Id::fromString(
-                        "Install" + pluginSpec->name + QString::number(qHash(installOptionsList)));
+                    const Utils::Id infoBarId = Utils::Id("Install")
+                            .withSuffix(pluginSpec->name)
+                            .withSuffix(QString::number(qHash(installOptionsList)));
 
                     InfoBarEntry entry(infoBarId, msg, InfoBarEntry::GlobalSuppression::Enabled);
 
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizardfactory.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizardfactory.cpp
index 7b2a5bda023..c435921b195 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizardfactory.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizardfactory.cpp
@@ -159,7 +159,7 @@ static JsonWizardFactory::Generator parseGenerator(const QVariant &value, QStrin
         *errorMessage = Tr::tr("Generator has no typeId set.");
         return gen;
     }
-    Id typeId = Id::fromString(QLatin1String(Constants::GENERATOR_ID_PREFIX) + strVal);
+    Id typeId = Id(Constants::GENERATOR_ID_PREFIX).withSuffix(strVal);
     JsonWizardGeneratorFactory *factory
             = findOr(generatorFactories(), nullptr, [typeId](JsonWizardGeneratorFactory *f) { return f->canCreate(typeId); });
     if (!factory) {
@@ -326,7 +326,7 @@ std::pair<int, QStringList> JsonWizardFactory::screenSizeInfoFromPage(const QStr
      * pages[i] is the page of type `pageType` and data[j] is the data item with name ScreenFactor
     */
 
-    const Utils::Id id = Utils::Id::fromString(Constants::PAGE_ID_PREFIX + pageType);
+    const Utils::Id id = Utils::Id(Constants::PAGE_ID_PREFIX).withSuffix(pageType);
 
     const auto it = std::find_if(std::cbegin(m_pages), std::cend(m_pages), [&id](const Page &page) {
         return page.typeId == id;
@@ -393,7 +393,7 @@ JsonWizardFactory::Page JsonWizardFactory::parsePage(const QVariant &value, QStr
         *errorMessage = Tr::tr("Page has no typeId set.");
         return p;
     }
-    Id typeId = Id::fromString(QLatin1String(Constants::PAGE_ID_PREFIX) + strVal);
+    Id typeId = Id(Constants::PAGE_ID_PREFIX).withSuffix(strVal);
 
     JsonWizardPageFactory *factory
             = Utils::findOr(pageFactories(), nullptr, [typeId](JsonWizardPageFactory *f) { return f->canCreate(typeId); });
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizardgeneratorfactory.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizardgeneratorfactory.cpp
index b85641f9c31..8fd3b4ecc23 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizardgeneratorfactory.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizardgeneratorfactory.cpp
@@ -259,13 +259,14 @@ bool JsonWizardGenerator::allDone(const JsonWizard *wizard, JsonWizard::Generato
 
 void JsonWizardGeneratorFactory::setTypeIdsSuffixes(const QStringList &suffixes)
 {
-    m_typeIds = Utils::transform(suffixes, [](QString suffix)
-        { return Id::fromString(QString::fromLatin1(Constants::GENERATOR_ID_PREFIX) + suffix); });
+    m_typeIds = Utils::transform(suffixes, [](QString suffix) {
+        return Id(Constants::GENERATOR_ID_PREFIX).withSuffix(suffix);
+    });
 }
 
 void JsonWizardGeneratorFactory::setTypeIdsSuffix(const QString &suffix)
 {
-    setTypeIdsSuffixes(QStringList() << suffix);
+    setTypeIdsSuffixes({suffix});
 }
 
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizardpagefactory.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizardpagefactory.cpp
index 0961cfa9064..4b2589228e5 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizardpagefactory.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizardpagefactory.cpp
@@ -9,19 +9,16 @@
 
 namespace ProjectExplorer {
 
-// --------------------------------------------------------------------
-// JsonWizardPageFactory:
-// --------------------------------------------------------------------
-
 void JsonWizardPageFactory::setTypeIdsSuffixes(const QStringList &suffixes)
 {
     m_typeIds = Utils::transform(suffixes, [](const QString &suffix) {
-        return Utils::Id::fromString(QString::fromLatin1(Constants::PAGE_ID_PREFIX) + suffix);});
+        return Utils::Id(Constants::PAGE_ID_PREFIX).withSuffix(suffix);
+    });
 }
 
 void JsonWizardPageFactory::setTypeIdsSuffix(const QString &suffix)
 {
-    setTypeIdsSuffixes(QStringList() << suffix);
+    setTypeIdsSuffixes({suffix});
 }
 
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/projectimporter.cpp b/src/plugins/projectexplorer/projectimporter.cpp
index 9c12b89c8b9..8cd4d2359c0 100644
--- a/src/plugins/projectexplorer/projectimporter.cpp
+++ b/src/plugins/projectexplorer/projectimporter.cpp
@@ -38,7 +38,7 @@ static Utils::Id fullId(Utils::Id id)
     const QString idStr = id.toString();
     QTC_ASSERT(!idStr.startsWith(prefix), return Utils::Id::fromString(idStr));
 
-    return Utils::Id::fromString(prefix + idStr);
+    return Utils::Id::fromString(prefix).withSuffix(idStr);
 }
 
 static bool hasOtherUsers(Utils::Id id, const QVariant &v, Kit *k)
diff --git a/src/plugins/projectexplorer/workspaceproject.cpp b/src/plugins/projectexplorer/workspaceproject.cpp
index 53b77f91fcf..840941bda55 100644
--- a/src/plugins/projectexplorer/workspaceproject.cpp
+++ b/src/plugins/projectexplorer/workspaceproject.cpp
@@ -26,21 +26,21 @@
 #include <QJsonDocument>
 #include <QJsonObject>
 
-const QLatin1StringView FOLDER_MIMETYPE{"inode/directory"};
-const QLatin1StringView WORKSPACE_MIMETYPE{"text/x-workspace-project"};
-const QLatin1StringView WORKSPACE_PROJECT_ID{"ProjectExplorer.WorkspaceProject"};
-const QLatin1StringView WORKSPACE_PROJECT_RUNCONFIG_ID{"WorkspaceProject.RunConfiguration:"};
-
-const QLatin1StringView PROJECT_NAME_KEY{"project.name"};
-const QLatin1StringView FILES_EXCLUDE_KEY{"files.exclude"};
-const QLatin1StringView EXCLUDE_ACTION_ID{"ProjectExplorer.ExcludeFromWorkspace"};
-const QLatin1StringView RESCAN_ACTION_ID{"ProjectExplorer.RescanWorkspace"};
-
 using namespace Utils;
 using namespace Core;
 
 namespace ProjectExplorer {
 
+const QLatin1StringView FOLDER_MIMETYPE{"inode/directory"};
+const QLatin1StringView WORKSPACE_MIMETYPE{"text/x-workspace-project"};
+const char WORKSPACE_PROJECT_ID[] = "ProjectExplorer.WorkspaceProject";
+const char WORKSPACE_PROJECT_RUNCONFIG_ID[] = "WorkspaceProject.RunConfiguration:";
+
+const QLatin1StringView PROJECT_NAME_KEY{"project.name"};
+const QLatin1StringView FILES_EXCLUDE_KEY{"files.exclude"};
+const char EXCLUDE_ACTION_ID[] = "ProjectExplorer.ExcludeFromWorkspace";
+const char RESCAN_ACTION_ID[] = "ProjectExplorer.RescanWorkspace";
+
 const expected_str<QJsonObject> projectDefinition(const Project *project)
 {
     if (auto fileContents = project->projectFilePath().fileContents())
@@ -231,8 +231,8 @@ public:
     WorkspaceProjectRunConfigurationFactory()
     {
         registerRunConfiguration<WorkspaceRunConfiguration>(
-            Id::fromString(WORKSPACE_PROJECT_RUNCONFIG_ID));
-        addSupportedProjectType(Id::fromString(WORKSPACE_PROJECT_ID));
+            Id(WORKSPACE_PROJECT_RUNCONFIG_ID));
+        addSupportedProjectType(WORKSPACE_PROJECT_ID);
     }
 };
 
@@ -243,7 +243,7 @@ public:
     {
         setProduct<SimpleTargetRunner>();
         addSupportedRunMode(Constants::NORMAL_RUN_MODE);
-        addSupportedRunConfig(Id::fromString(WORKSPACE_PROJECT_RUNCONFIG_ID));
+        addSupportedRunConfig(WORKSPACE_PROJECT_RUNCONFIG_ID);
     }
 };
 
@@ -268,7 +268,7 @@ public:
         registerBuildConfiguration<WorkspaceBuildConfiguration>
                 ("WorkspaceProject.BuildConfiguration");
 
-        setSupportedProjectType(Id::fromString(WORKSPACE_PROJECT_ID));
+        setSupportedProjectType(WORKSPACE_PROJECT_ID);
 
         setBuildGenerator([](const Kit *, const FilePath &projectPath, bool forSetup) {
             BuildInfo info;
@@ -298,7 +298,7 @@ public:
             projectFilePath().writeFileContents(QJsonDocument(projectJson).toJson());
         }
 
-        setId(Id::fromString(WORKSPACE_PROJECT_ID));
+        setId(WORKSPACE_PROJECT_ID);
         setDisplayName(projectDirectory().fileName());
         setBuildSystemCreator<WorkspaceBuildSystem>();
     }
@@ -347,8 +347,8 @@ void setupWorkspaceProject(QObject *guard)
     ProjectManager::registerProjectType<WorkspaceProject>(WORKSPACE_MIMETYPE);
 
     QAction *excludeAction = nullptr;
-    ActionBuilder(guard, Id::fromString(EXCLUDE_ACTION_ID))
-        .setContext(Id::fromString(WORKSPACE_PROJECT_ID))
+    ActionBuilder(guard, EXCLUDE_ACTION_ID)
+        .setContext(WORKSPACE_PROJECT_ID)
         .setText(Tr::tr("Exclude from Project"))
         .addToContainer(Constants::M_FOLDERCONTEXT, Constants::G_FOLDER_OTHER)
         .addToContainer(Constants::M_FILECONTEXT, Constants::G_FILE_OTHER)
@@ -363,8 +363,8 @@ void setupWorkspaceProject(QObject *guard)
         });
 
     QAction *rescanAction = nullptr;
-    ActionBuilder(guard, Id::fromString(RESCAN_ACTION_ID))
-        .setContext(Id::fromString(WORKSPACE_PROJECT_ID))
+    ActionBuilder(guard, RESCAN_ACTION_ID)
+        .setContext(WORKSPACE_PROJECT_ID)
         .setText(Tr::tr("Rescan Workspace"))
         .addToContainer(Constants::M_PROJECTCONTEXT, Constants::G_PROJECT_REBUILD)
         .bindContextAction(&rescanAction)
diff --git a/src/plugins/qmldesigner/designmodewidget.cpp b/src/plugins/qmldesigner/designmodewidget.cpp
index a203fb68674..c22b84dd61e 100644
--- a/src/plugins/qmldesigner/designmodewidget.cpp
+++ b/src/plugins/qmldesigner/designmodewidget.cpp
@@ -347,7 +347,7 @@ void DesignModeWidget::setup()
 
         // Create menu action
         auto command = Core::ActionManager::registerAction(dockWidget->toggleViewAction(),
-                                                           actionToggle.withSuffix(uniqueId + "Widget"),
+                                                           actionToggle.withSuffix(uniqueId).withSuffix("Widget"),
                                                            designContext);
         command->setAttribute(Core::Command::CA_Hide);
         viewCommands.append(command);
@@ -368,8 +368,7 @@ void DesignModeWidget::setup()
 
         // Create menu action
         auto command = Core::ActionManager::registerAction(dockWidget->toggleViewAction(),
-                                                           actionToggle.withSuffix(
-                                                               widgetInfo.uniqueId + "Widget"),
+                                                           actionToggle.withSuffix(widgetInfo.uniqueId).withSuffix("Widget"),
                                                            designContext);
         command->setAttribute(Core::Command::CA_Hide);
         viewCommands.append(command);
diff --git a/src/plugins/qtsupport/baseqtversion.cpp b/src/plugins/qtsupport/baseqtversion.cpp
index a8d940c6efc..354425867fe 100644
--- a/src/plugins/qtsupport/baseqtversion.cpp
+++ b/src/plugins/qtsupport/baseqtversion.cpp
@@ -225,7 +225,7 @@ static QSet<Id> versionedIds(const QByteArray &prefix, int major, int minor)
     if (major < 0)
         return result;
 
-    const QByteArray majorStr = QString::number(major).toLatin1();
+    const QByteArray majorStr = QByteArray::number(major);
     const QByteArray featureMajor = prefix + majorStr;
     const QByteArray featureDotMajor = prefix + '.' + majorStr;
 
@@ -233,9 +233,8 @@ static QSet<Id> versionedIds(const QByteArray &prefix, int major, int minor)
     result.insert(Id::fromName(featureDotMajor));
 
     for (int i = 0; i <= minor; ++i) {
-        const QByteArray minorStr = QString::number(i).toLatin1();
-        result.insert(Id::fromName(featureMajor + '.' + minorStr));
-        result.insert(Id::fromName(featureDotMajor + '.' + minorStr));
+        result.insert(Id::fromName(featureMajor).withSuffix('.').withSuffix(i));
+        result.insert(Id::fromName(featureDotMajor).withSuffix('.').withSuffix(i));
     }
 
     // FIXME: Terrible hack. Get rid of using version numbers as tags!