I have created a one page static website with the text "Hello". When I open the page using other third party websites, they report load times of around 15ms. When I open the website from my location, it takes between 500ms - 2s to load.
I'm trying to determine if this is a problem with my ISP, congestion, the DNS Servers in my area, or settings on the computers I am using to open this website. My internet connection is 4Mbps, so it should be able to open a small page like this quickly.
How can I diagnose why the same website takes 15ms somewhere else in the world, but 500ms in my office ?