Interesting, thanks for sharing! I agree that the shared folder situation is catastrophic. Doing anything significant with the mounted folders, like doing builds or simply watching for changes is unbearably slow. What I generally do is have a 'rsync' container and attach its volume (--volumes-from) to all containers that depend on the folders. Then, I watch on local file changes and rsync to the container. Builds etc. are all done within containers and this seems to work great!