At least it is also implemented by windows, which cause apt-get in hyperv vm slower And also unbearable slow for loopback device backed docker container in the

At least it is also implemented by windows, which cause apt-get in hyperv vm slower And also unbearable slow for loopback device backed docker container in the vm due to double layer of cache. I just add eat-my-data happily because you can't save a half finished docker image anyway.