continued from https://forums.docker.com/t/file-access-in-mounted-volumes-extremely-slow-cpu-bound/8076/178

Expected behavior

File-system performance in the container not significantly slower than on the host or docker-machine.

Actual behavior

Running a composer (PHP) update in a container takes much longer than on the host. In the container we usually hit timeouts when updating huge git repos like twbs/bootstrap.

Information & Steps to reproduce the behavior

See link above