diff --git a/src/app/main.cpp b/src/app/main.cpp
index 8b7b8d62944..f78cd20e402 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -84,10 +84,6 @@
 #include "client/settings.h"
 #endif
 
-#ifdef Q_OS_LINUX
-#include <malloc.h>
-#endif
-
 using namespace ExtensionSystem;
 
 enum { OptionIndent = 4, DescriptionIndent = 34 };
@@ -757,32 +753,5 @@ int main(int argc, char **argv)
     // shutdown plugin manager on the exit
     QObject::connect(&app, &QCoreApplication::aboutToQuit, &pluginManager, &PluginManager::shutdown);
 
-#ifdef Q_OS_LINUX
-    class MemoryTrimmer : public QObject
-    {
-    public:
-        MemoryTrimmer()
-        {
-            m_trimTimer.setSingleShot(true);
-            m_trimTimer.setInterval(60000);
-            // glibc may not actually free memory in free().
-            connect(&m_trimTimer, &QTimer::timeout, this, [] { malloc_trim(0); });
-        }
-
-        bool eventFilter(QObject *, QEvent *e) override
-        {
-            if ((e->type() == QEvent::MouseButtonPress || e->type() == QEvent::KeyPress)
-                    && !m_trimTimer.isActive()) {
-                m_trimTimer.start();
-            }
-            return false;
-        }
-
-        QTimer m_trimTimer;
-    };
-    MemoryTrimmer trimmer;
-    app.installEventFilter(&trimmer);
-#endif
-
     return restarter.restartOrExit(app.exec());
 }
diff --git a/src/plugins/coreplugin/icore.cpp b/src/plugins/coreplugin/icore.cpp
index dc96efbd35a..4e65891c329 100644
--- a/src/plugins/coreplugin/icore.cpp
+++ b/src/plugins/coreplugin/icore.cpp
@@ -832,6 +832,11 @@ void ICore::registerWindow(QWidget *window, const Context &context)
     new WindowSupport(window, context); // deletes itself when widget is destroyed
 }
 
+void ICore::restartTrimmer()
+{
+    m_mainwindow->restartTrimmer();
+}
+
 /*!
     Opens files using \a filePaths and \a flags like it would be
     done if they were given to \QC on the command line, or
diff --git a/src/plugins/coreplugin/icore.h b/src/plugins/coreplugin/icore.h
index 518386b0aea..b1c9b5b39e5 100644
--- a/src/plugins/coreplugin/icore.h
+++ b/src/plugins/coreplugin/icore.h
@@ -124,6 +124,7 @@ public:
     static void removeContextObject(IContext *context);
 
     static void registerWindow(QWidget *window, const Context &context);
+    static void restartTrimmer();
 
     enum OpenFilesFlags {
         None = 0,
diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index ae51062df2a..b2474d5a0ad 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -113,6 +113,10 @@
 #include <QVersionNumber>
 #include <QWindow>
 
+#ifdef Q_OS_LINUX
+#include <malloc.h>
+#endif
+
 using namespace ExtensionSystem;
 using namespace Utils;
 
@@ -228,6 +232,13 @@ MainWindow::MainWindow()
     });
     connect(dropSupport, &DropSupport::filesDropped,
             this, &MainWindow::openDroppedFiles);
+
+#ifdef Q_OS_LINUX
+    m_trimTimer.setSingleShot(true);
+    m_trimTimer.setInterval(60000);
+    // glibc may not actually free memory in free().
+    connect(&m_trimTimer, &QTimer::timeout, this, [] { malloc_trim(0); });
+#endif
 }
 
 NavigationWidget *MainWindow::navigationWidget(Side side) const
@@ -367,6 +378,12 @@ void MainWindow::restart()
     exit();
 }
 
+void MainWindow::restartTrimmer()
+{
+    if (!m_trimTimer.isActive())
+        m_trimTimer.start();
+}
+
 void MainWindow::closeEvent(QCloseEvent *event)
 {
     const auto cancelClose = [event] {
@@ -419,6 +436,18 @@ void MainWindow::closeEvent(QCloseEvent *event)
     alreadyClosed = true;
 }
 
+void MainWindow::keyPressEvent(QKeyEvent *event)
+{
+    restartTrimmer();
+    AppMainWindow::keyPressEvent(event);
+}
+
+void MainWindow::mousePressEvent(QMouseEvent *event)
+{
+    restartTrimmer();
+    AppMainWindow::mousePressEvent(event);
+}
+
 void MainWindow::openDroppedFiles(const QList<DropSupport::FileSpec> &files)
 {
     raiseWindow();
diff --git a/src/plugins/coreplugin/mainwindow.h b/src/plugins/coreplugin/mainwindow.h
index 674bebf5719..7947943f6c8 100644
--- a/src/plugins/coreplugin/mainwindow.h
+++ b/src/plugins/coreplugin/mainwindow.h
@@ -32,6 +32,7 @@
 #include <utils/dropsupport.h>
 
 #include <QColor>
+#include <QTimer>
 
 #include <functional>
 #include <unordered_map>
@@ -118,12 +119,16 @@ public:
 
     void openFileFromDevice();
 
+    void restartTrimmer();
+
 public slots:
     static void openFileWith();
     void exit();
 
 protected:
     void closeEvent(QCloseEvent *event) override;
+    void keyPressEvent(QKeyEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
 
 private:
     static void openFile();
@@ -153,6 +158,7 @@ private:
     void updateModeSelectorStyleMenu();
 
     ICore *m_coreImpl = nullptr;
+    QTimer m_trimTimer;
     QStringList m_aboutInformation;
     Context m_highPrioAdditionalContexts;
     Context m_lowPrioAdditionalContexts;
diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index aac38ac2dab..b70b214d190 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -2372,6 +2372,8 @@ static inline bool isPrintableText(const QString &text)
 
 void TextEditorWidget::keyPressEvent(QKeyEvent *e)
 {
+    ICore::restartTrimmer();
+
     ExecuteOnDestruction eod([&]() { d->clearBlockSelection(); });
 
     if (!isModifier(e) && mouseHidingEnabled())
@@ -5460,6 +5462,8 @@ static bool handleForwardBackwardMouseButtons(QMouseEvent *e)
 
 void TextEditorWidget::mousePressEvent(QMouseEvent *e)
 {
+    ICore::restartTrimmer();
+
     if (e->button() == Qt::LeftButton) {
         MultiTextCursor multiCursor = multiTextCursor();
         const QTextCursor &cursor = cursorForPosition(e->pos());