Speed up long-running test cases.

test/mjsunit/compiler/regress-4.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16 matching lines @@
 
 // Test deoptimization after a loop.
 function f(p) {
   var y=0;
   for (var x=0; x<10; x++) {
     if (x > 5) { y=y+p; break;}
   }
   return y+x;
 }
 
-for (var i=0; i<10000000; i++) f(42);
+for (var i=0; i<100000; i++) f(42);
 
 var result = f("foo");
 assertEquals("0foo6", result);