You can get a speed test source for your website from www.ScanmySpeed.Com . Here are the steps for installing speed test for your website,
Download the ScanmySpeed Zipped file using the button provided above.
Extract the zipped folder named ScanmySpeed.
Upload the extracted ScanmySpeed folder to your website. Place the ScanmySpeed folder in the directory that contains the page where you intend to run ScanmySpeed.
Copy and paste this line of code in the page where you want to run ScanmySpeed: