Change kMinComplexMemCopy to 64 for IA32. It's just better.

src/utils.h

 // Copyright 2006-2008 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 569 matching lines @@
   (*memcopy)(dest, src, size);
 #ifdef DEBUG
   CHECK_EQ(0, memcmp(dest, src, size));
 #endif
 }
 
 
 // Limit below which the extra overhead of the MemCopy function is likely
 // to outweigh the benefits of faster copying.
 // TODO(lrn): Try to find a more precise value.
-static const int kMinComplexMemCopy = 256;
+static const int kMinComplexMemCopy = 64;
 
 #else  // V8_TARGET_ARCH_IA32
 
 static inline void MemCopy(void* dest, const void* src, size_t size) {
   memcpy(dest, src, size);
 }
 
 static const int kMinComplexMemCopy = 256;
 
 #endif  // V8_TARGET_ARCH_IA32
@@ skipping 135 matching lines @@
 
   Dest dest;
   memcpy(&dest, &source, sizeof(dest));
   return dest;
 }
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_UTILS_H_