Performance Engineering Knowledge Base
Frontend Performance Optimization Guide
Production playbooks spanning Core Web Vitals, JavaScript delivery, caching architecture and image optimization. Measure the metric, isolate the bottleneck in DevTools, then ship a fix you can lock in with a CI budget.
Browse by Topic
Advanced Caching Strategies Cdn Architecture
CDN edge caching, Cache-Control, stale-while-revalidate and Service Workers.
25 guides
Core Web Vitals & Measurement
Measure and fix LCP, INP and CLS with reconciled field and lab data.
33 guides
Image Media Optimization
Responsive images, AVIF/WebP, fetchpriority and CLS-safe lazy loading.
19 guides
Javascript Bundle Optimization Code Splitting
Code-split, tree-shake and shrink JavaScript payloads off the critical path.
23 guides
Start Here
Understanding Core Web Vitals Thresholds
What LCP < 2.5s, INP < 200ms and CLS < 0.1 actually mean at the p75 boundary.
HTTP Cache-Control Headers Explained
max-age, immutable, s-maxage and SWR composed into a fast, correct cache policy.
Serving AVIF & WebP with Fallbacks
Ship next-gen image formats safely and cut LCP image bytes without breakage.
Dynamic Imports & Route-Based Splitting
Defer non-critical JavaScript by route to shrink the initial bundle.
Recently Added Guides
Reducing vendor chunk size in a React app
A diagnosis-to-verification workflow for shrinking an oversized webpack vendor chunk in a React application.
Webpack Bundle Analysis Techniques
A diagnostic workflow for finding and budgeting JavaScript payload bloat in Webpack 5 builds.
Configure webpack-bundle-analyzer for Production
A step-by-step fix for getting accurate, non-blocking bundle analysis out of production Webpack builds.
Tree Shaking and Dead Code Elimination
A diagnostic workflow for driving unused JavaScript below 5% with tree shaking, sideEffects contracts, and minifier-level dead code elimination.
Fixing Tree Shaking Issues with Lodash and Moment
Diagnose and fix the CommonJS barriers that stop bundlers from tree shaking lodash and moment, then validate the byte reduction in CI.
esbuild vs Terser for production minification
A decision matrix comparing esbuild and Terser on minification speed, compression ratio, mangling safety, and dead-code elimination — with a benchmark workflow and CI guardrail.