When I "docker push" to a private repository hosted on the local network or host, the upload process is entirely bound by the speed of compressing each layer with xz, using a single CPU.

I'd like an option to disable compression when pushing, or to specify an alternate compression command (pigz http://zlib.net/pigz/ for example).