https://vercel.com/docs/analytics,Vercel Analytics,https://github.com/csabapalfi/awesome-pagespeed-metrics#readme,PageSpeed Metrics error: <HTTPError 308: 'Permanent Redirect'> | reason: Permanent Redirect
https://developer.mozilla.org/en-US/docs/Web/API/Frame_Timing_API,Docs - Frame Timing API,https://github.com/csabapalfi/awesome-pagespeed-metrics#readme,PageSpeed Metrics error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://calibreapp.com/blog/how-pagespeed-works/,How Google Pagespeed works,https://github.com/csabapalfi/awesome-pagespeed-metrics#readme,PageSpeed Metrics error: <HTTPError 308: 'Unknown'> | reason: Unknown
https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index,Docs - Visually Complete - WPT,https://github.com/csabapalfi/awesome-pagespeed-metrics#readme,PageSpeed Metrics error: <HTTPError 404: 'Not Found'> | reason: Not Found
https://www.akamai.com/uk/en/products/performance/mpulse-real-user-monitoring.jsp,Akamai mPulse,https://github.com/csabapalfi/awesome-pagespeed-metrics#readme,PageSpeed Metrics error: timeout('The read operation timed out') | reason: 