Looking for logging into the Performance Check site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Performance Check site. After that you can login as usual with your login credentials.
https://www.performance-checker.de/login.php
https://www.performance-checker.de/kunden_login.php
https://www.dolomitisuperski.com/en/Live-info/Performance-check
https://sqa.stackexchange.com/questions/29571/how-we-can-test-login-functionality-with-different-credentials-at-same-time-usi
https://gtmetrix.com/
https://guide.blazemeter.com/hc/en-us/articles/207421705-How-to-use-JMeter-for-Login-Authentication
https://loadimpact.com/
https://www.loginvsi.com/login-vsi/vmware-horizon-view
https://www.webpagetest.org/forums/showthread.php?tid=12630
https://www.uptrends.com/tools/website-speed-test
https://www.dareboost.com/
https://www.pingdom.com/
https://www.dotcom-tools.com/web-server-performance-test.aspx