It's wrk2 as a Docker image.
You probably want to throw traffic at something you've deployed somewhere, but if you've got a service running on your host port 8000, you can do something like:
docker run -it hodgesmr/wrk2 -t2 -c100 -d30s -R2000 --latency http://host.docker.internal:8000
This project is maintained by @hodgesmr.
Please use it for good, not evil.