Guide · PerformanceCore Web Vitals Guide: Improve LCP, INP and CLS Step by StepLearn what LCP, INP and CLS measure, how lab and field data differ, and the practical fixes for images, fonts, JavaScript and layout shifts.9 min readGuide · PerformanceHow to Check Your Website Speed for Free (and What to Fix First)Test your website speed with free tools, understand the numbers in plain language, and fix the biggest problems first: images, hosting, scripts and caching.7 min readGuide · PerformanceHow to Reduce Time to First Byte (TTFB): Measure and Fix ItBreak TTFB into DNS, connect, TLS and server time, measure each with a ready curl format string, then cut it with caching, query tuning and a CDN.9 min readGuide · PerformanceHTTP/2 and HTTP/3 Explained: What Changes and How to Enable ThemUnderstand multiplexing, QUIC and head-of-line blocking, when HTTP/2 and HTTP/3 actually help, and how to enable and verify them on nginx and Cloudflare.7 min readGuide · PerformanceImage Optimization Guide: WebP, AVIF, Sizing, srcset, Lazy LoadingChoose between JPEG, PNG, WebP and AVIF, size images correctly, use srcset and lazy loading, and batch convert with cwebp, avifenc and sharp.6 min readGuide · PerformanceWhy Is My Website Slow? A Step-by-Step Diagnosis FlowchartWork through DNS, connect, TLS, TTFB, download and render in order to find which stage makes your site slow, with the right tool and command for each.8 min read