Hi, there are lot of good APM (application performance monitoring tools) out there like New Relic and AppDynamics. If you do a search there are some free front end website tests you can do: https://www.pingdom.com/
Our tool measures and increases website performance from a SQL perspective, which is a common performance bottleneck. You can get a free download at: http://www.heimdalldata.com/download/
Feel free to reach out to me if you have further questions: firstname.lastname@example.org
Here to help.