Automate Performance Boosts Using Experiments

WebPageTest just launched new features where you can run a new test with fixes applied to see how they'll affect your Core Web Vitals. @scottjehl will teach us how it works. 0:00:00 - Welcome 0:00:23 - What is Web Page Test? 0:01:47 - Guest introduction 0:04:33 - What is happening behind the scenes with Web Page Test? 0:07:56 - How do you use metrics to decide what to do? 0:13:05 - Dealing with first input delay 0:23:05 - Testing code changes without changing code? 0:33:05 - What have they introduced recently? 0:41:32 - What should we test? 0:56:38 - Viewing it with CSS inline 1:07:40 - An example of the worst performing web page 1:17:40 - Create experiments tool 1:22:10 - Where to find out more about WebPageTest? Demo: https://www.webpagetest.org/result/220615_BiDcQM_BF4 Links https://blog.webpagetest.org/posts/introducing-opportunities-and-experiments/ https://www.learnwithjason.dev/ https://twitter.com/scottjehl https://www.webpagetest.org/ https://www.webpagetest.org/themetrictimes/index.php https://twitter.com/tkadlec/status/1536689811473543172 https://twitter.com/realwebpagetest https://www.twitch.tv/webpagetest Watch future episodes live at https://twitch.tv/jlengstorf This episode was sponsored by: - Netlify (https://lwj.dev/netlify) - Nx (https://lwj.dev/nx) - Backlight (https://lwj.dev/backlight) Live transcription by White Coat Captioning (https://whitecoatcaptioning.com/) Credits: Local Elevator by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300012 Artist: http://incompetech.com/ Busybody by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://audionautix.com/ Additional sound effects obtained from https://www.zapsplat.com