diff -r ee5cc9e78493 -r d6f45b55c972 src/share/vm/runtime/arguments.cpp
--- a/src/share/vm/runtime/arguments.cpp	Fri Aug 20 09:55:50 2010 -0700
+++ b/src/share/vm/runtime/arguments.cpp	Fri Aug 27 17:33:49 2010 -0700
@@ -1513,6 +1513,9 @@
   if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) {
     FLAG_SET_DEFAULT(OptimizeStringConcat, true);
   }
+  if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeFill)) {
+    FLAG_SET_DEFAULT(OptimizeFill, true);
+  }
 #endif
 
   if (AggressiveOpts) {