Google has some interesting products as well as good information about speed optimization. See https://developers.google.com/speed/docs/insights/about
See Mozilla's [https://developer.mozilla.org/en-US/docs/Tools Firefox Developer Tools]. or Chrome Dev Tools
Use [https://httpd.apache.org/docs/2.4/programs/ab.html Apache Bench] for local testing and establishing a baseline before tweaking anything on the server.
Not directly related, but there is also <nowiki>https://www.browserling.com/</nowiki> for testing different browsers.
[[Category:System Administration]]
[[Category:Google]]