From 27dee2f8d5cb66d7da9771c5f55abf125f6a96ca Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Tue, 16 May 2017 21:12:19 +0200
Subject: [PATCH] don't update LayeredLexerEditorHighlighter layers on each
 editor paint (IDEA-172756)

---
 .../editor/ex/util/LayeredLexerEditorHighlighter.java    | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LayeredLexerEditorHighlighter.java b/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LayeredLexerEditorHighlighter.java
index 8719c0735840..ecf2729bc1a8 100644
--- a/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LayeredLexerEditorHighlighter.java
+++ b/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LayeredLexerEditorHighlighter.java
@@ -188,17 +188,8 @@ public class LayeredLexerEditorHighlighter extends LexerEditorHighlighter {
   @NotNull
   @Override
   public HighlighterIterator createIterator(int startOffset) {
-    // do NOT synchronize before updateLayers due to deadlock with PsiLock
-    final boolean changed = updateLayers();
-
     //noinspection SynchronizeOnThis
     synchronized (this) {
-      if (changed) {
-        Document document = getDocument();
-        if (document != null) {
-          resetText(document.getImmutableCharSequence());
-        }
-      }
       return new LayeredHighlighterIteratorImpl(startOffset);
     }
   }