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In this episode, Scott and Wes chat about 20 different ways you can improve the perf, speed and overall user experience of your websites. Cloudinary - Sponsor Cloudinary is the best way to host, compress and transform your images on the web. Sign up for their free tier and get 10GB of bandwidth for free! Also check out Cloudinary's ImageCon conference - use the code SYNTAX99 for a discount when checking out. Fluent Conf - Sponsor Developers, software engineers, designers, and web performance professionals flock to Fluent in pursuit of a common goal: building a better web. That means delivering fast, secure, accessible experiences to users and customers. Fluent covers a broad range of technologies and topics to provide web programming professionals with the skills, connections, and inspiration needed to build better online and mobile experiences. Fluent is this June 11-14 in San Jose, CA. Save 20% today with code: SYNTAX Show Notes So many perf tips came in over twitter, so in addition to this podcast I'd recommend you read all the replies to this tweet 0:00 We just cracked 1,000,000 downloads! Thank you! 4:00 Network Tips Reducing the amount of HTTP requests A little bit about HTTP2 An interview about http2 8:00 Use Caching and LocalStorage Turn on aggressive caching on your server - long expire times What is gzip? / Enabling gzip 12:00 Using a CDN Listen to our episode on CDNs and #BigZips 13:00 When to load your JS Blocking Requests 15:00 Use Lazy Loading 17:00 Preloading content with Link rel="preload" rel="prefetch" 19:00 Picture, picturefill and srcset="" Article on srcsrc and Picture srcset vs picture/source elements 25:00 Image Compression One less jpg Serve less data 26:00 Inline SVG Talk about Font Awesome 33:00 CSS and JS Code Critical CSS 37:00 Remove unused code Purify CSS no-unused-imports with ESlint 38:00 Code Splitting 40:00 Transpile less babel-preset-env 41:00 Tree shaking Hoyyyy its a tree shaker 42:00 Async ans defer attributes on your script tags Amazing site that visualizes async and defer 45:00 Icon Fonts Web Fonts Native Font Stack: Good: font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; 47:00 font-display 49:00 Troubleshooting Performance Simulate Slow Network Speed Google Page Speed Wes' Page Speed Video SIIIIICKkkkkkkkk PIXXXXX Scott: WiFi Surge Protector Wes: KitSound Bluetooth Airline Converter Shameless Plugs Scott is working on a Vue course! Wes is working on his Advanced React course! 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