From 81bb4e0913e3b32a6a4d2ce2d64a16b6db73f372 Mon Sep 17 00:00:00 2001
From: "peter.gromov" <peter@jetbrains.com>
Date: Fri, 12 Nov 2010 18:56:00 +0300
Subject: [PATCH] much faster property search (thanks to Nik pointing out that
 I'm not able to write intersection correctly from the first time)

---
 .../com/intellij/psi/impl/search/PsiSearchHelperImpl.java  | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/platform/lang-impl/src/com/intellij/psi/impl/search/PsiSearchHelperImpl.java b/platform/lang-impl/src/com/intellij/psi/impl/search/PsiSearchHelperImpl.java
index 28fef28a9ba1..2c3c9fc6c6f1 100644
--- a/platform/lang-impl/src/com/intellij/psi/impl/search/PsiSearchHelperImpl.java
+++ b/platform/lang-impl/src/com/intellij/psi/impl/search/PsiSearchHelperImpl.java
@@ -646,10 +646,9 @@ public class PsiSearchHelperImpl implements PsiSearchHelper {
           first = false;
         }
         else {
-          for (VirtualFile file : local.keySet()) {
-            if (intersection.containsKey(file)) {
-              intersection.putValues(file, local.get(file));
-            }
+          intersection.keySet().retainAll(local.keySet());
+          for (VirtualFile file : intersection.keySet()) {
+            intersection.get(file).retainAll(local.get(file));
           }
         }
       }