Serializer: micro-optimizations for the deserializer.

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index a7cfda8667b2306fcf2db63ff7e9ab50f17eb2e2..00405dda91a2999739b6fa45fcff3ce435c90e35 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -508,9 +508,7 @@ void Deserializer::DecodeReservation(
   DCHECK_EQ(0, reservations_[NEW_SPACE].length());
   STATIC_ASSERT(NEW_SPACE == 0);
   int current_space = NEW_SPACE;
-  for (int i = 0; i < res.length(); i++) {
-    SerializedData::Reservation r(0);
-    memcpy(&r, res.start() + i, sizeof(r));
+  for (auto& r : res) {
     reservations_[current_space].Add({r.chunk_size(), NULL, NULL});
     if (r.is_last()) current_space++;
   }