Don’t have any experiences yet with artillery, but it sounds fun; will give it a try. In the meantime I will check if 3.1.1-beta.1 will help on that issue; I can upgrade now, thanks to @zodern’s latest update of montiapm agent beta 10.
Update: Just tried to run my server tests on github; however, they fail due to reached heap limit (2GB). Never had a memory issue on mocha tests before.