If something is wrong you should no instead of recovering production site from start.
Thanks Arsalan. May I know why? Please throw some light. Thank You.
Maybe I should remind that do not perform testing on live production website :)
There is a solution about how to test your website's load time. If you are using Cloudflare, then you can. You can by opening the dashboard then clicking your domain name then click on the Speed app\button then it may automatically test the load speed, If it didn't start the scan automatically, scroll the page then click on the "Test Again" button.