optimize inlay updates (relates to IDEA-185347)

platform/platform-impl/src/com/intellij/openapi/editor/impl/InlayImpl.java

@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
+// 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.
 package com.intellij.openapi.editor.impl;
 
 import com.intellij.openapi.editor.EditorCustomElementRenderer;
@@ -50,8 +36,9 @@ class InlayImpl extends RangeMarkerImpl implements Inlay, Getter<InlayImpl> {
 
   @Override
   public void updateSize() {
+    int oldWidth = myWidthInPixels;
     doUpdateSize();
-    myEditor.getInlayModel().notifyChanged(this);
+    if (oldWidth != myWidthInPixels) myEditor.getInlayModel().notifyChanged(this);
   }
 
   @Override