Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/memory/MemoryNodeBuilder.java
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/memory/MemoryNodeBuilder.java	(revision 1404493)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/memory/MemoryNodeBuilder.java	(working copy)
@@ -18,6 +18,7 @@
 
 import java.util.Iterator;
 import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
 
 import javax.annotation.Nonnull;
 
@@ -69,6 +70,8 @@
  */
 public class MemoryNodeBuilder implements NodeBuilder {
 
+    public static final AtomicLong SNAPSHOT_COUNTER = new AtomicLong();
+
     static final NodeState NULL_STATE = new MemoryNodeState(
             ImmutableMap.<String, PropertyState>of(),
             ImmutableMap.<String, NodeState>of());
@@ -442,6 +445,7 @@
                         nodes.put(name, null);
                     }
                 } else {
+                    SNAPSHOT_COUNTER.incrementAndGet();
                     NodeState after = node.snapshot();
                     if (after != before) {
                         nodes.put(name, after);
Index: oak-core/src/test/java/org/apache/jackrabbit/oak/api/TreeLocationTest.java
===================================================================
--- oak-core/src/test/java/org/apache/jackrabbit/oak/api/TreeLocationTest.java	(revision 0)
+++ oak-core/src/test/java/org/apache/jackrabbit/oak/api/TreeLocationTest.java	(revision 0)
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.jackrabbit.oak.api;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jackrabbit.oak.Oak;
+import org.apache.jackrabbit.oak.plugins.memory.MemoryNodeBuilder;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * <code>TreeLocationTest</code>...
+ */
+public class TreeLocationTest {
+
+    private ContentRepository repository;
+
+    @Before
+    public void setUp() {
+        repository = new Oak().createContentRepository();
+    }
+
+    @After
+    public void tearDown() {
+        repository = null;
+    }
+
+    @Test
+    public void getStatus() throws Exception {
+        ContentSession session = repository.login(null, null);
+        Root r = session.getLatestRoot();
+        Tree t = r.getTree("/");
+        createTree(t, 3, 10);
+        r.commit();
+
+        session = repository.login(null, null);
+        r = session.getLatestRoot();
+        long c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get();
+        r.getTree("/").getChild("node0").getChild("node1").getChild("node2");
+        c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get() - c;
+        System.out.println("snapshots: " + c);
+        measureGetStatus(r);
+
+        session = repository.login(null, null);
+        r = session.getLatestRoot();
+        c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get();
+        read(r, r.getTree("/node0/node1/node2"));
+        c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get() - c;
+        System.out.println("snapshots: " + c);
+        measureGetStatus(r);
+
+        session = repository.login(null, null);
+        r = session.getLatestRoot();
+        c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get();
+        read(r, r.getTree("/"));
+        c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get() - c;
+        System.out.println("snapshots: " + c);
+        measureGetStatus(r);
+    }
+
+    private void measureGetStatus(Root r) {
+        TreeLocation l = r.getTree("/").getLocation();
+        long time = System.currentTimeMillis();
+        List<Long> counts = new ArrayList<Long>();
+        for (int i = 0; i < 10; i++) {
+            long c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get();
+            l.getStatus();
+            c = MemoryNodeBuilder.SNAPSHOT_COUNTER.get() - c;
+            counts.add(c);
+        }
+        time = System.currentTimeMillis() - time;
+        System.out.println("" + time + " ms. (" + counts + ")");
+    }
+
+    private void read(Root r, Tree t) {
+        r.getTree(t.getPath());
+        for (Tree child : t.getChildren()) {
+            read(r, child);
+        }
+    }
+
+    private void createTree(Tree t, int numChildren, int level) {
+        if (level-- <= 0) {
+            return;
+        }
+        for (int i = 0; i < numChildren; i++) {
+            createTree(t.addChild("node" + i), numChildren, level);
+        }
+    }
+
+}

Property changes on: oak-core\src\test\java\org\apache\jackrabbit\oak\api\TreeLocationTest.java
___________________________________________________________________
Added: svn:keywords
   + Author Date Id Revision Rev URL
Added: svn:eol-style
   + native