diff --git a/kdecore/kiconloader.cpp b/kdecore/kiconloader.cpp
index 91992f929..e460e5d41 100644
--- a/kdecore/kiconloader.cpp
+++ b/kdecore/kiconloader.cpp
@@ -106,7 +106,11 @@ struct KIconGroup
     bool alphaBlending;
 };
 
-#define KICONLOADER_CHECKS
+// WARNING
+// Enabling this in production will cause a massive slowdown of (and a related memory leak in)
+// any application that creates and destroys large numbers of KIconLoader instances
+//#define KICONLOADER_CHECKS
+
 #ifdef KICONLOADER_CHECKS
 // Keep a list of recently created and destroyed KIconLoader instances in order
 // to detect bugs like #68528.