Thanks for the tip! I was vaguely aware of uWSGI, but I must have dismissed it as a python thing back then. I didn't know it supported Perl out of the box.

By the way we don't have too many problems with Starman, it does its job. One grumble I have with it is that it being a descendant of Net::Server::PreFork, it has support for dynamically scaling the number of workers, but this fact is not documented and normally it is set up to use a fixed number of workers.