diff --git a/src/main_wayland.cpp b/src/main_wayland.cpp
index 000178c59e..66e4cd8369 100644
--- a/src/main_wayland.cpp
+++ b/src/main_wayland.cpp
@@ -285,6 +285,11 @@ int main(int argc, char *argv[])
     // enforce our internal qpa plugin, unfortunately command line switch has precedence
     setenv("QT_QPA_PLATFORM", "wayland-org.kde.kwin.qpa", true);
 
+    // The shader (currently) causes a blocking disk flush on load and save of every QQuickWindow
+    // Because it's on load, it will happen every time not just occasionally
+    // The gains are minimal, disable until it's fixed
+    QCoreApplication::setAttribute(Qt::AA_DisableShaderDiskCache);
+
     KWin::ApplicationWayland a(argc, argv);
 
     // reset QT_QPA_PLATFORM so we don't propagate it to our children (e.g. apps launched from the overview effect)
diff --git a/src/main_x11.cpp b/src/main_x11.cpp
index 3506eb07ed..b3729c8704 100644
--- a/src/main_x11.cpp
+++ b/src/main_x11.cpp
@@ -400,6 +400,11 @@ int main(int argc, char *argv[])
     // For sharing thumbnails between our scene graph and qtquick.
     QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
 
+    // The shader (currently) causes a blocking disk flush on load and save of every QQuickWindow
+    // Because it's on load, it will happen every time not just occasionally
+    // The gains are minimal, disable until it's fixed
+    QCoreApplication::setAttribute(Qt::AA_DisableShaderDiskCache);
+
     QSurfaceFormat format = QSurfaceFormat::defaultFormat();
     // shared opengl contexts must have the same reset notification policy
     format.setOptions(QSurfaceFormat::ResetNotification);