diff -r 5a4c01d9419f parsing.api/src/org/netbeans/modules/parsing/spi/indexing/support/IndexResult.java
--- a/parsing.api/src/org/netbeans/modules/parsing/spi/indexing/support/IndexResult.java	Tue Dec 17 21:53:05 2013 +0000
+++ b/parsing.api/src/org/netbeans/modules/parsing/spi/indexing/support/IndexResult.java	Thu Dec 19 15:21:31 2013 +0200
@@ -46,6 +46,7 @@
 import java.net.URL;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.concurrent.ConcurrentHashMap;
 import org.netbeans.modules.parsing.impl.indexing.DeletedIndexable;
 import org.netbeans.modules.parsing.impl.indexing.FileObjectIndexable;
 import org.netbeans.modules.parsing.impl.indexing.SPIAccessor;
@@ -66,6 +67,7 @@
     private final org.netbeans.modules.parsing.lucene.support.IndexDocument spi;
     private final URL root;
 
+    private final static ConcurrentHashMap<String,URL> cachedUrls = new ConcurrentHashMap(10);
     private volatile URL cachedUrl;
     private volatile FileObject cachedFile;
 
@@ -87,7 +89,10 @@
     }
 
     public URL getUrl() {
-        if (cachedUrl == null) {
+        String cacheKey = root+spi.getPrimaryKey();
+        if (cachedUrls.containsKey(cacheKey))
+            cachedUrl = cachedUrls.get(cacheKey);
+        else if (cachedUrl == null) {
             URL url = null;
             try {
                 url = Util.resolveUrl(root, spi.getPrimaryKey(), false);
@@ -100,6 +105,16 @@
                     cachedUrl = url;
                 }
             }
+            
+            /* Ensure the cached map retains maximal size of 10 */
+            synchronized (cachedUrls) {
+                if (cachedUrls.size() >= 10)
+                {
+                    String oldestCachedFile = cachedUrls.keys().nextElement();
+                    cachedUrls.remove(oldestCachedFile);
+                }
+                cachedUrls.putIfAbsent(cacheKey, cachedUrl);
+            }
         }
         return cachedUrl;
     }