Make Object.freeze fast

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index a69c539911da64045d1cae9f109e7847d2d83b07..bb982b4f136685cc5d79d18bbc5f859aa16b751c 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -2964,6 +2964,17 @@ bool Heap::CreateInitialObjects() {
   }
   set_observation_state(JSObject::cast(obj));
 
+  { MaybeObject* maybe_obj = AllocateSymbol();
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  set_frozen_symbol(Symbol::cast(obj));
+
+  { MaybeObject* maybe_obj = SeededNumberDictionary::Allocate(this, 0, TENURED);
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  SeededNumberDictionary::cast(obj)->set_requires_slow_elements();
+  set_empty_slow_element_dictionary(SeededNumberDictionary::cast(obj));
+
   // Handling of script id generation is in FACTORY->NewScript.
   set_last_script_id(undefined_value());