Optimize the scope creation code by lazily allocating the hash maps...

src/objects.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3415 matching lines @@
 }
 
 
 const uc16* SeqTwoByteString::SeqTwoByteStringGetData(unsigned start) {
   return reinterpret_cast<uc16*>(
       reinterpret_cast<char*>(this) - kHeapObjectTag + kHeaderSize) + start;
 }
 
 
 void SeqTwoByteString::SeqTwoByteStringReadBlockIntoBuffer(ReadBlockBuffer* rbb,
-                                                     unsigned* offset_ptr,
-                                                     unsigned max_chars) {
+                                                           unsigned* offset_ptr,
+                                                           unsigned max_chars) {
   unsigned chars_read = 0;
   unsigned offset = *offset_ptr;
   while (chars_read < max_chars) {
     uint16_t c = *reinterpret_cast<uint16_t*>(
         reinterpret_cast<char*>(this) -
             kHeapObjectTag + kHeaderSize + offset * kShortSize);
     if (c <= kMaxAsciiCharCode) {
       // Fast case for ASCII characters.   Cursor is an input output argument.
       if (!unibrow::CharacterStream::EncodeAsciiCharacter(c,
                                                           rbb->util_buffer,
@@ skipping 4020 matching lines @@
   // No break point.
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 } }  // namespace v8::internal