From ba096e237bc2a69a5a6e9424657aef6986b2b006 Mon Sep 17 00:00:00 2001
From: Roman Shevchenko <roman.shevchenko@jetbrains.com>
Date: Wed, 6 Apr 2016 18:51:54 +0200
Subject: [PATCH] [vfs] minor memory optimization

---
 .../src/com/intellij/openapi/vfs/impl/local/FileWatcher.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/platform-impl/src/com/intellij/openapi/vfs/impl/local/FileWatcher.java b/platform/platform-impl/src/com/intellij/openapi/vfs/impl/local/FileWatcher.java
index 85a570c1547f..eb6c7fd564ef 100644
--- a/platform/platform-impl/src/com/intellij/openapi/vfs/impl/local/FileWatcher.java
+++ b/platform/platform-impl/src/com/intellij/openapi/vfs/impl/local/FileWatcher.java
@@ -184,7 +184,7 @@ public class FileWatcher {
 
     @Override
     public void notifyManualWatchRoots(@NotNull Collection<String> roots) {
-      myManualWatchRoots.add(ContainerUtil.newHashSet(roots));
+      myManualWatchRoots.add(roots.isEmpty() ? Collections.emptySet() : ContainerUtil.newHashSet(roots));
       notifyOnAnyEvent();
     }