Speed up long-running test cases.

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

Index: test/mjsunit/compiler/math-floor-global.js
diff --git a/test/mjsunit/compiler/math-floor-global.js b/test/mjsunit/compiler/math-floor-global.js
index 9ec183fab1b0a416d7a9257bdcefeaeac2419ef7..3b9d1254537dce8d3dfb8a09ca0deacc278d57ff 100644
--- a/test/mjsunit/compiler/math-floor-global.js
+++ b/test/mjsunit/compiler/math-floor-global.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // 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;
@@ -140,8 +140,9 @@ function test() {
 
 
 // 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);
 }
 
 
@@ -158,4 +159,4 @@ 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));