Speed up two unit tests to avoid timeouts and make tests finish faster.

test/mjsunit/array-join.js

 // Copyright 2008 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 57 matching lines @@
 assertEquals('array****3****4****array****array', a.join('****'));
 assertEquals('array********3********4********array********array', a.join('********'));
 assertEquals('array**********3**********4**********array**********array', a.join('**********'));
 
 // Restore original toString.
 delete Array.prototype.toString;
 if (Array.prototype.toString != oldToString) {
   Array.prototype.toString = oldToString;
 }
 
-var a = new Array(123123123);
-assertEquals(123123122, String(a).length);
-assertEquals(123123122, a.join(",").length);
-assertEquals(246246244, a.join("oo").length);
+var a = new Array(123123);
+assertEquals(123122, String(a).length);
+assertEquals(123122, a.join(",").length);
+assertEquals(246244, a.join("oo").length);
 
 a = new Array(Math.pow(2,32) - 1);  // Max length.
 assertEquals("", a.join(""));
 a[123123123] = "o";
 a[1255215215] = "p";
 assertEquals("op", a.join(""));
 
 a = new Array(100001);
 for (var i = 0; i < a.length; i++) a[i] = undefined;
 a[5] = "ab";
 a[90000] = "cd";
-assertEquals("abcd", a.join(""));  // Must not throw.
+assertEquals("abcd", a.join(""));  // Must not throw.