Tune mjsunit/regress/regress-2612.

test/mjsunit/regress/regress-2612.js

 // Copyright 2013 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 39 matching lines @@
   seed = seed * 131 % 1773 + 13;
   return seed % max;
 }
 
 function varname(i) {
   return "_" + i;
 }
 
 var source = "var ";
 
-for (var i = 0; i < 1000; i++) {
+for (var i = 0; i < 750; i++) {
   source += [varname(i), "=", rand(), ","].join("");
 }
 
-for (var i = 1000; i < 100000; i++) {
+for (var i = 750; i < 3000; i++) {
   source += [varname(i), "=",
              varname(randi(i)), "+",
              varname(randi(i)), ","].join("");
 }
 
 source += "x=1; return _0;"
 var f = new Function(source);
 
 f();
 %OptimizeFunctionOnNextCall(f);
 f();
-