Frontend performance has dozens of metrics. Three of them genuinely matter. Core Web Vitals -- LCP, INP, and CLS -- are the small set of measurements Google has converged the industry around, and the ones I actually look at when investigating slow pages. Here's what each one means, what it's catching, and the patterns that fix them.
Engineering Craft
TypeScript, CI/CD, databases, observability -- the skills that make code production-ready.
