use allocated byte buffers instead of vectors for PackedValue, wins back all or most of the performance loss on this branch
use allocated byte buffers instead of vectors for PackedValue, wins back all or most of the performance loss on this branch

willbryant/kitchen_sync,willbryant/kitchen_sync,willbryant/kitchen_sync,willbryant/kitchen_sync,willbryant/kitchen_sync,willbryant/kitchen_sync