Fundamentals × What Makes a Website Slow?

In this episode of Syntax, Wes and Scott talk through all the reasons your website might be slow, and how you can troubleshoot a slow website such as issues on the server, large assets, caching, CSS, JavaScript, latency, and more. Sentry - Sponsor If you want to know what’s happening with your code, track errors and monitor performance with Sentry. Sentry’s Application Monitoring platform helps developers see performance issues, fix errors faster, and optimize their code health. Cut your time on error resolution from hours to minutes. It works with any language and integrates with dozens of other services. Syntax listeners new to Sentry can get two months for free by visiting Sentry.io and using the coupon code TASTYTREAT during sign up. Show Notes 00:11 Welcome Glove 80 keyboard Raycast 03:06 Sponsor: Sentry 05:15 What makes a website slow? Uses.tech 06:29 Server Generation Times 13:33 Large payloads Redis Gzip Brotli compression Cloudflare Cloudinary 18:13 Assets being too large 23:01 Caching assets 28:25 CDN 30:35 Caching 101 37:04 Render blocking requests 40:01 CSS 42:25 JavaScript 44:51 Latency 49:17 Flash of dark mode or unsigned out 55:00 Data uris Content-visibility vite-plugin-singlefile Pool in your URL 58:11 SIIIIICK ××× PIIIICKS ××× ××× SIIIIICK ××× PIIIICKS ××× Scott: 3Blue1Brown Wes: Suavecito Firme Clay Pomade Shameless Plugs Scott: LevelUp Tutorials Wes: Wes Bos Tutorials Tweet us your tasty treats Scott’s Instagram LevelUpTutorials Instagram Wes’ Instagram Wes’ Twitter Wes’ Facebook Scott’s Twitter Make sure to include @SyntaxFM in your tweets