Reduce the size of initial JSON string buffer.

src/json-parser.h

 // Copyright 2011 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.
 
 #ifndef V8_JSON_PARSER_H_
 #define V8_JSON_PARSER_H_
 
 #include "src/v8.h"
 
 #include "src/char-predicates-inl.h"
@@ skipping 162 matching lines @@
   // Mark that a parsing error has happened at the current token, and
   // return a null handle. Primarily for readability.
   inline Handle<Object> ReportUnexpectedCharacter() {
     return Handle<Object>::null();
   }
 
   inline Isolate* isolate() { return isolate_; }
   inline Factory* factory() { return factory_; }
   inline Handle<JSFunction> object_constructor() { return object_constructor_; }
 
-  static const int kInitialSpecialStringLength = 1024;
+  static const int kInitialSpecialStringLength = 32;
   static const int kPretenureTreshold = 100 * 1024;
 
 
  private:
   Zone* zone() { return &zone_; }
 
   void CommitStateToJsonObject(Handle<JSObject> json_object, Handle<Map> map,
                                ZoneList<Handle<Object> >* properties);
 
   Handle<String> source_;
@@ skipping 646 matching lines @@
 
   DCHECK_EQ('"', c0_);
   // Advance past the last '"'.
   AdvanceSkipWhitespace();
   return result;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_PARSER_H_