Speed up long-running test cases.

test/mjsunit/compiler/math-floor-global.js

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --max-new-space-size=256 --allow-natives-syntax
+// Flags: --max-new-space-size=128 --allow-natives-syntax
 
 // Test inlining of Math.floor when assigned to a global.
 var flo = Math.floor;
 var test_id = 0;
 
 function testFloor(expect, input) {
   var test = new Function('n',
                           '"' + (test_id++) + '";return flo(n)');
   assertEquals(expect, test(input));
   assertEquals(expect, test(input));
@@ skipping 94 matching lines @@
   testFloor(-two_52, -two_52 + 0.7);
 
   testFloor(-two_52 + 1, -two_52 + 1);
   testFloor(-two_52 + 1, -two_52 + 1 + 0.1);
   testFloor(-two_52 + 1, -two_52 + 1 + 0.5);
   testFloor(-two_52 + 1, -two_52 + 1 + 0.7);
 }
 
 
 // Test in a loop to cover the custom IC and GC-related issues.
-for (var i = 0; i < 50; i++) {
+for (var i = 0; i < 10; i++) {
   test();
+  new Array(i * 10000);
 }
 
 
 // Regression test for a bug where a negative zero coming from Math.floor
 // was not properly handled by other operations.
 function floorsum(i, n) {
   var ret = Math.floor(n);
   while (--i > 0) {
     ret += Math.floor(n);
   }
   return ret;
 }
 assertEquals(-0, floorsum(1, -0));
 %OptimizeFunctionOnNextCall(floorsum);
 // The optimized function will deopt.  Run it with enough iterations to try
 // to optimize via OSR (triggering the bug).
-assertEquals(-0, floorsum(100000, -0));
+assertEquals(-0, floorsum(50000, -0));