I've been working in the performance industry (focusing on front-end performance and UX) for 15 years. Some resources you might find helpful:
• Steve Souders' books 'High Performance Web Sites' & 'Even Faster Web Sites' – https://stevesouders.com/ – Steve literally wrote the book(s) on performance and is widely considered the godfather of the industry.
• WPO stats – https://wpostats.com/ – Case studies and experiments demonstrating the impact of performance optimization on UX and business metrics
• Intro to Web Performance – https://support.speedcurve.com/docs/psychology-of-web-perfor... – This is a collection of introductory articles covering topics like the psychology of sit speed to Core Web Vitals to how to create a performance culture in your organization.
• Steve Souders' books 'High Performance Web Sites' & 'Even Faster Web Sites' – https://stevesouders.com/ – Steve literally wrote the book(s) on performance and is widely considered the godfather of the industry.
• WPO stats – https://wpostats.com/ – Case studies and experiments demonstrating the impact of performance optimization on UX and business metrics
• performance.now() talks – https://www.youtube.com/c/WebConferencesAmsterdam/videos – PerfNow is the only annual global conference dedicated to performance. You can watch past talks on their YouTube channel.
• Intro to Web Performance – https://support.speedcurve.com/docs/psychology-of-web-perfor... – This is a collection of introductory articles covering topics like the psychology of sit speed to Core Web Vitals to how to create a performance culture in your organization.