Use JS to test the target website's open response speed and js target

Use JS to test the target website's open response speed and js target

I wrote a simple test directory website opening speed item using JS. Note that this is only the speed at which the local directory website is opened. It does not mean that other users can open the directory at this speed, it can also be used to test the local network speed.

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
The network environment of each computer is very complex, so the value of this script is only for reference.