This is a really free SEO tool that analyzes web pages for loading speed efficiency. It does more than just give you a loading speed time though. It provides web developers with a comprehensive list of good aspects of their pages along with aspects that can be improved. After you enter a web address, it’ll do three page separate page loads of that particular page.
Basically they tell you what files are your webpage should be compressed to make your site faster. After the test grades will be given for the webpage in six areas including first byte time, Keep-alive Enabled, Compress Transfer, Compress Images, Cache static content and effective use of CDN. If you are confused by the results webpagetest.org provides links to explanations of the terms. They also have a forum in which you can ask questions.
This is another great free resource for web developers to improve their webpage’s SEO. https://www.webpagetest.org/