Ask HN: How to get a high load on a website in a short time?

Create a simple script (using python requests, bash + curl, whatever), and invoke it a bunch of times on a large machine on EC2 using a bash program for example. you want a machine that can handle many of these scripts running simultaneously. use multiple instances if you must.

Not very sophisticated, but it'll tell you if your scaling/load-balancing/etc. is sufficient to do what you need it to do.

I can recommend https://loader.io/. There's a couple of alternatives like https://www.blitz.io/

To run load testing yourself, there's a list at the bottom of https://www.digitalocean.com/community/tutorials/how-to-use-... I avoid that because my client (laptop) becomes the bottleneck when simulating high production load.