Run it and then consume its REST API:
# spawn as many clients you want/can
curl -X POST http://localhost:3000/load/connect -d 'howMany=100'
# log them in
curl -X POST http://localhost:3000/load/login
# subscribe to receive room's messages and events
curl -X POST http://localhost:3000/load/subscribe/GENERAL
# start sending messages
curl -X POST http://localhost:3000/load/message/send
# stop sending messages
curl -X DELETE http://localhost:3000/load/message/send