increase logs performance, do not copy bytes object
increase logs performance, do not copy bytes object

Signed-off-by: Pavel Sviderski <2375fa63e2908bb2df59f606483a3aa92321db7a@psviderski.name>

dimaspivak/docker-py,vpetersson/docker-py,funkyfuture/docker-py,youhong316/docker-py,kaiyou/docker-py,kaiyou/docker-py,vdemeester/docker-py,docker/docker-py,funkyfuture/docker-py,dimaspivak/docker-py,youhong316/docker-py,vdemeester/docker-py,vpetersson/docker-py,docker/docker-py