Message 351343 - Python tracker

We have recently bumped into a similar problem. Using FreeBSD, subprocess calls were taking more than 10 times the usual time to execute after migrating to python3.6. After some digging, the default for 'close_fds' was changed to 'True'. On linux, this actually made things faster, but for unix, much slower. Passing 'close_fds=False' solved this for us.