Make block writes in the serializer more efficient.

src/snapshot-source-sink.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/snapshot-source-sink.h"
 
 #include "src/base/logging.h"
 #include "src/handles-inl.h"
 #include "src/serialize.h"  // for SerializerDeserializer::nop() in AtEOF()
@@ skipping 36 matching lines @@
   if (integer > 0xffffff) bytes = 4;
   integer |= (bytes - 1);
   Put(static_cast<int>(integer & 0xff), "IntPart1");
   if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
   if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
   if (bytes > 3) Put(static_cast<int>((integer >> 24) & 0xff), "IntPart4");
 }
 
 void SnapshotByteSink::PutRaw(byte* data, int number_of_bytes,
                               const char* description) {
-  for (int i = 0; i < number_of_bytes; ++i) {
-    Put(data[i], description);
-  }
+  data_.AddAll(Vector<byte>(data, number_of_bytes));
 }
 
 void SnapshotByteSink::PutBlob(byte* data, int number_of_bytes,
                                const char* description) {
   PutInt(number_of_bytes, description);
   PutRaw(data, number_of_bytes, description);
 }
 
 
 bool SnapshotByteSource::AtEOF() {
@@ skipping 14 matching lines @@
     Advance(size);
     return true;
   } else {
     Advance(length_ - position_);  // proceed until end.
     return false;
   }
 }
 
 }  // namespace v8::internal
 }  // namespace v8