I removed the unnecessary middleware bloat (pug html renderer middleware for an API server, really? body-parser and form parser even for endpoints where it's not being used?) and switched to standard pg instead of pg-promise (standard pg also supports promises, pg-promise hasn't been needed for quite a while now)
The performance went from 600req/s to 5500 req/s on the db benchmark, 9x improvement with 10 minutes of work. I think thats a pretty damning result for the tech-empower framework benchmarks quality, at least when it comes to node. This is just standard libraries and practices, not even hacks like replacing the built in url parser with fast-url-parser.