--- a/jdk/src/share/classes/java/net/URLClassLoader.java	Mon Sep 14 17:47:26 2009 +0100
+++ b/jdk/src/share/classes/java/net/URLClassLoader.java	Mon Sep 14 13:37:26 2009 -0700
@@ -340,6 +340,7 @@
      * used.
      */
     private Class defineClass(String name, Resource res) throws IOException {
+        long t0 = System.nanoTime();
         int i = name.lastIndexOf('.');
         URL url = res.getCodeSourceURL();
         if (i != -1) {
@@ -370,12 +371,14 @@
             // Use (direct) ByteBuffer:
             CodeSigner[] signers = res.getCodeSigners();
             CodeSource cs = new CodeSource(url, signers);
+            sun.misc.PerfCounter.getReadClassBytesTime().addElapsedTimeFrom(t0);
             return defineClass(name, bb, cs);
         } else {
             byte[] b = res.getBytes();
             // must read certificates AFTER reading bytes.
             CodeSigner[] signers = res.getCodeSigners();
             CodeSource cs = new CodeSource(url, signers);
+            sun.misc.PerfCounter.getReadClassBytesTime().addElapsedTimeFrom(t0);
             return defineClass(name, b, 0, b.length, cs);
         }
     }