Siege is an open source regression test and benchmark utility. It can stress test a single URL with a user defined number of simulated users, or it can read many URLs into memory and stress them simultaneously. https://www.joedog.org/siege-home/
See https://github.com/JoeDog/siege/releases for releases.
Edit the Makefile to ensure that you are setting the intended version, then run make.
make