From cc1209d0290ee877478b62db151ff4b3fc9f55dc Mon Sep 17 00:00:00 2001
From: Sergey Prigogin <eclipse.sprigogin@gmail.com>
Date: Mon, 19 Mar 2012 19:27:28 -0700
Subject: [PATCH] Don't update index timestamp if nothing has changed.

---
 .../parser/org/eclipse/cdt/internal/core/pdom/PDOM.java        | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
index e507340e261..c0e9f1fede2 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/pdom/PDOM.java
@@ -956,7 +956,8 @@ public class PDOM extends PlatformObject implements IPDOM {
 			CCorePlugin.log(e);
 		}
 		assert lockCount == -1;
-		lastWriteAccess= System.currentTimeMillis();
+		if (!fEvent.isTrivial())
+			lastWriteAccess= System.currentTimeMillis();
 		final ChangeEvent event= fEvent;
 		fEvent= new ChangeEvent();
 		synchronized (mutex) {