Create optimized inline versions of Map and Set initialization

src/factory.cc

 // 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.
 
 #include "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/conversions.h"
 #include "src/isolate-inl.h"
@@ skipping 121 matching lines @@
   DCHECK(small.total_count() > 0);
   DCHECK(extended.total_count() > 0);
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateExtendedConstantPoolArray(small, extended),
       ConstantPoolArray);
 }
 
 
 Handle<OrderedHashSet> Factory::NewOrderedHashSet() {
-  return OrderedHashSet::Allocate(isolate(), 4);
+  return OrderedHashSet::Allocate(isolate(), OrderedHashSet::kMinCapacity);
 }
 
 
 Handle<OrderedHashMap> Factory::NewOrderedHashMap() {
-  return OrderedHashMap::Allocate(isolate(), 4);
+  return OrderedHashMap::Allocate(isolate(), OrderedHashMap::kMinCapacity);
 }
 
 
 Handle<AccessorPair> Factory::NewAccessorPair() {
   Handle<AccessorPair> accessors =
       Handle<AccessorPair>::cast(NewStruct(ACCESSOR_PAIR_TYPE));
   accessors->set_getter(*the_hole_value(), SKIP_WRITE_BARRIER);
   accessors->set_setter(*the_hole_value(), SKIP_WRITE_BARRIER);
   return accessors;
 }
@@ skipping 2363 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal