压力测试只在浏览器中运行的JAvascript文件

I need to run a Javascript file for a relatively long time(maybe about 5 weeks or so at one time), without it stopping or being interrupted. Currently the script is a client side script which connects to the server and receives data via Sockjs. There is no HTMl/GUI. There is only some computation. I need to run a Javascript file for a relativel