diff --git a/platform/core-api/src/com/intellij/openapi/components/ApplicationComponent.java b/platform/core-api/src/com/intellij/openapi/components/ApplicationComponent.java
index 05577f503984..162af8450249 100644
--- a/platform/core-api/src/com/intellij/openapi/components/ApplicationComponent.java
+++ b/platform/core-api/src/com/intellij/openapi/components/ApplicationComponent.java
@@ -1,7 +1,13 @@
-// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.openapi.components;
 
 /**
+ * Please use application services or extensions instead of application component, because
+ * if you register a class as an application component it will be loaded, its instance will be created and
+ * {@link #initComponent()} methods will be called each time IDE is started even if user doesn't use any feature of your
+ * plugin. So consider using specific extensions instead to ensure that the plugin will not impact IDE performance until user calls its
+ * actions explicitly.
+ *
  * @deprecated This interface is not used anymore. Application component do no need to extend any special interface.
  *
  * Instead of {@link #initComponent()} please use {@link com.intellij.util.messages.MessageBus} and corresponding topics.
@@ -12,7 +18,7 @@ package com.intellij.openapi.components;
 @Deprecated
 public interface ApplicationComponent extends BaseComponent {
   /**
-   * @deprecated Not used anymore.
+   * @deprecated Adapter not required since Java 8 is used.
    */
   @Deprecated
   class Adapter implements ApplicationComponent {