Add performance tests for Map/Set with String and Object keys

test/js-perf-test/Collections/weakset.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 var SetBenchmark = new BenchmarkSuite('WeakSet', [1000], [
-  new Benchmark('Add', false, false, 0, WeakSetAdd),
+  new Benchmark('Add', false, false, 0, WeakSetAdd, WeakSetSetupBase,
+      WeakSetTearDown),
   new Benchmark('Has', false, false, 0, WeakSetHas, WeakSetSetup,
       WeakSetTearDown),
   new Benchmark('Delete', false, false, 0, WeakSetDelete, WeakSetSetup,
       WeakSetTearDown),
 ]);
 
 
 var ws;
-var N = 10;
-var keys = [];
 
 
-for (var i = 0; i < N * 2; i++) {
-  keys[i] = {};
+function WeakSetSetupBase() {
+  SetupObjectKeys();
+  ws = new WeakSet;
 }
 
 
 function WeakSetSetup() {
-  ws = new WeakSet;
-  for (var i = 0; i < N; i++) {
-    ws.add(keys[i]);
-  }
+  WeakSetSetupBase();
+  WeakSetAdd();
 }
 
 
 function WeakSetTearDown() {
   ws = null;
 }
 
 
 function WeakSetAdd() {
-  WeakSetSetup();
-  WeakSetTearDown();
+  for (var i = 0; i < N; i++) {
+    ws.add(keys[i]);
+  }
 }
 
 
 function WeakSetHas() {
   for (var i = 0; i < N; i++) {
     if (!ws.has(keys[i])) {
       throw new Error();
     }
   }
   for (var i = N; i < 2 * N; i++) {
     if (ws.has(keys[i])) {
       throw new Error();
     }
   }
 }
 
 
 function WeakSetDelete() {
   // This is run more than once per setup so we will end up deleting items
   // more than once. Therefore, we do not the return value of delete.
   for (var i = 0; i < N; i++) {
     ws.delete(keys[i]);
   }
 }