From 9ed6fc54e75ffa0e53743f541eadd206c109ef49 Mon Sep 17 00:00:00 2001
From: Alexey Kudravtsev <cdr@intellij.com>
Date: Mon, 28 Aug 2017 19:47:31 +0300
Subject: [PATCH] avoid nonsensical clear()

---
 .../openapi/vfs/newvfs/persistent/PersistentFSImpl.java      | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/persistent/PersistentFSImpl.java b/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/persistent/PersistentFSImpl.java
index c860a774735b..876a13eb631f 100644
--- a/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/persistent/PersistentFSImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/vfs/newvfs/persistent/PersistentFSImpl.java
@@ -865,18 +865,17 @@ public class PersistentFSImpl extends PersistentFS implements ApplicationCompone
 
     int startIndex = 0;
     List<Runnable> applyEvents = new ArrayList<>(events.size());
-    List<VFileEvent> validated = new ArrayList<>(events.size());
     Set<String> files = new THashSet<>(events.size());
     Set<String> middleDirs = new THashSet<>(events.size());
     while (startIndex != events.size()) {
       applyEvents.clear();
-      validated.clear();
+      List<VFileEvent> validated = new ArrayList<>(events.size() - startIndex);
       files.clear();
       middleDirs.clear();
       startIndex = groupAndValidate(events, startIndex, applyEvents, validated, files, middleDirs);
 
       if (!validated.isEmpty()) {
-        List<VFileEvent> toSend = Collections.unmodifiableList(new ArrayList<>(validated));
+        List<VFileEvent> toSend = Collections.unmodifiableList(validated);
         myPublisher.before(toSend);
 
         applyEvents.forEach(Runnable::run);