From f908835810b2e4cb7cb66562edf19d8bf60d9ea8 Mon Sep 17 00:00:00 2001
From: Sergey Malenkov <sergey.malenkov@jetbrains.com>
Date: Fri, 28 Oct 2016 21:19:49 +0300
Subject: [PATCH] IDEA-162905 improve performance of children processing

---
 .../src/com/intellij/ide/util/treeView/AbstractTreeUi.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java b/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
index 326ca7ff470b..ed226b387a3f 100644
--- a/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
+++ b/platform/platform-api/src/com/intellij/ide/util/treeView/AbstractTreeUi.java
@@ -2689,6 +2689,11 @@ public class AbstractTreeUi {
           update(updateInfo.getDescriptor(), true);
         }
 
+        if (!updateInfo.isUpdateChildren()) {
+          nodeToProcessActions[0] = node;
+          return;
+        }
+
         Object element = getElementFromDescriptor(updateInfo.getDescriptor());
         if (element == null) {
           removeFromLoadedInBackground(oldElementFromDescriptor);
@@ -2698,7 +2703,7 @@ public class AbstractTreeUi {
 
         elementFromDescriptor.set(element);
 
-        Object[] loadedElements = updateInfo.isUpdateChildren() ? getChildrenFor(element) : ArrayUtil.EMPTY_OBJECT_ARRAY;
+        Object[] loadedElements = getChildrenFor(element);
 
         final LoadedChildren loaded = new LoadedChildren(loadedElements);
         for (final Object each : loadedElements) {