If you want to check performance of website from multiple locations around the world, you can do that on InternetSupervision. Just go to the website, and provide URL of the website that you want to check, and it will report performance results of the website from around the globe.
This is completely free, and you do not even need to register. Just enter the URL, and you will get the performance results.
While reporting performance results, it also shows them on a map, so that you can visually see performance of your website in multiple locations globally.
It checks website performance at following locations:
You can also use this free service to check from multiple locations that your website is running fine. This comes handy when you are trying to see DNS propagation status, and want to check that website is not down anywhere.