If you are a website owner you can test how your website is performing at different locations using Site Relic.
It’s a Free tool to test how your website is performing at different locations.
Apart from website performance metrics, this free tool provides lot of extra metrics such as
- Screenshot Checker
- Website Security Check
- HTTP/2 Test
- X-Content Type Options Header
- HTTP Header Checker/X-XSS Protection Header/X-Frame Options Header & more
- SPF Record
- DNS Record Lookup
- SSL Checker
- Safe Browsing
- CORS Checker
All these for free.
You can start from here.