I'm curious about how the REST interface scales out. I've posted a bug to Gitlab about Postorius making a REST request for every list member on the list info page [1], but aside from waiting for a fix for that, I've also been looking more into the performance of the Mailman3 REST interface itself.
Testing with siege (15 concurrent users) on a production VM, I get 29 requests/sec and a concurrency of just 1.3x requesting the "/3.0/domains" URL. For "/3.0/system/versions" I get only about 0.2x concurrency. This may not scale too well to a very active Postorius, especially if 1 Postorious request results in many Mailman API requests.
Is anyone using anything besides wsgiref for the REST interface? (uwsgi, gunicorn, ?) I thought I could get some extra performance that way...
Eric