Web Performance Optimization

All Articles (6 articles)

• Web Performance Infrastructure: DNS, CDN, Caching, and Edge

  Frontend Engineering / Web Performance Optimization 19 min read

  Infrastructure optimization addresses the foundation of web performance—the layers between a user’s request and your application’s response. This article covers DNS as a performance lever, HTTP/3 and QUIC for eliminating protocol-level bottlenecks, CDN and edge computing for geographic proximity, compression strategies for payload reduction, and caching patterns that can reduce Time to First Byte (TTFB) by 85-95% while offloading 80%+ of traffic from origin servers.

• JavaScript Performance Optimization for the Web

  Frontend Engineering / Web Performance Optimization 15 min read

  JavaScript execution is the primary source of main-thread blocking in modern web applications. This article covers the browser’s script loading pipeline, task scheduling primitives, code splitting strategies, and Web Workers—with emphasis on design rationale and current API status as of 2025.

• CSS and Typography Performance Optimization

  Frontend Engineering / Web Performance Optimization 15 min read

  Master CSS delivery, critical CSS extraction, containment properties, and font optimization techniques including WOFF2, subsetting, variable fonts, and CLS-free loading strategies for optimal Core Web Vitals.

• Image Performance Optimization for the Web

  Frontend Engineering / Web Performance Optimization 12 min read

  Comprehensive guide to image optimization covering modern formats (AVIF, WebP, JPEG XL), responsive image implementation with srcset and sizes, loading strategies with fetchpriority and decoding attributes, and network-aware delivery. Targets 50-80% bandwidth reduction and significant Largest Contentful Paint (LCP) improvements.

• Core Web Vitals Measurement: Lab vs Field Data

  Frontend Engineering / Web Performance Optimization 17 min read

  How to measure, interpret, and debug Core Web Vitals using lab tools, field data (Real User Monitoring), and the web-vitals library. Covers metric-specific diagnostics for LCP, INP, and CLS with implementation patterns for production RUM pipelines.

• Web Performance Optimization: Overview and Playbook

  Frontend Engineering / Web Performance Optimization 8 min read

  Overview of web performance optimization covering infrastructure, JavaScript, CSS, images, and fonts. Provides quick reference tables and links to detailed articles in the series.