diff -r 784aaf9ee179 -r d0f57d3ea898 emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java
--- a/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java	Mon Jan 28 12:18:24 2013 +0100
+++ b/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java	Mon Jan 28 13:52:28 2013 +0100
@@ -44,5 +44,7 @@
         "while (expectedSize-- > arr.length) { arr.push(0); }; return arr;"
     )
     public static native byte[] expandArray(byte[] arr, int expectedSize);
-    
+
+    @JavaScriptBody(args = {}, body = "new Date().getMilliseconds() * 1000;")
+    public static native long nanoTime();
 }