autocannon

I use autocannon (1) because it is very high performance, and allows for advanced login flows etc. Very useful for load testing. Can generate a lot of traffic from one device. I also use sentry.io to monitory my performance in live environment. Their new "Performance" system allows you to measure and track response times for whole endopoints, and for parts of the endpoints. Quite useful to detect slow queries and so on. Previously in my carreer I have also used newrelic with much success, but it is at least 7 years since I have used that, so can't give a recent experience with them. Ps. no affiliation to any of the mentioned products/services above. [1] https://github.com/mcollina/autocannon

Gatling is super slow. Suspicious slow in fact. You will likely not be able to really hit your endpoints hard enough by using one machine only. Personally I use autocannon which in my testing is faster than k6 and easier to use with a node.js environment. It is only a npm package, not a full software you need to install on your machine. Autocannon in my testing is 2 orders of magnitude faster than gatling, but you should do your own testing. PS. I have no affiliations to autocannon, I'm just a very happy user. The only drawback compared to k6 is lack of websockets, which is unfortunate. https://github.com/mcollina/autocannon

You can even use nodejs' autocannon to benchmark your Rust webserver. That works too. https://github.com/mcollina/autocannon