Tag: #cdn

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• Using HTTP Caching Properly — What Cache-Control, ETag, and stale-while-revalidate Actually Mean

  no-cache does not mean do not cache. It means store it, but revalidate before reusing it. Starting from that one-word difference, this post lays out the exact meaning of each Cache-Control directive, what conditional req

  2026-07-26 · 11 min read #web#http-caching#cache-control#cdn#performance

• A DNS Deep Dive — The Infrastructure Hidden Behind Names ♪ Listenable

  DNS is not a simple name tag but a vast distributed infrastructure that holds up the internet. From the hierarchy and recursive/authoritative resolution, record types, TTL and caching, Anycast and GeoDNS, to DNSSEC and D

  2026-06-29 · 22 min read #network#dns#anycast#cdn#infrastructure

• CDN Complete Guide — Cache, Edge Compute, Origin Shield, and HTTP Caching Headers (2025)

  Everything about CDNs — the history of edge caching since Akamai in 1998, the routing trinity of Anycast plus DNS plus GSLB, the physical anatomy of PoPs and edge servers, Cache Key design and Vary header pitfalls, HTTP

  2026-04-15 · 15 min read #cdn#caching#edge-compute#cloudflare#fastly

• Performance & Core Web Vitals 2025 — LCP, CLS, INP, RUM, Image/Font/JS Optimization, Edge, CDN, HTTP/3 (S6 E6)

  Performance is not a feature — it is the precondition for every feature. The full 2025 Core Web Vitals map: LCP, CLS, INP (FID successor), RUM vs synthetic, critical rendering path, JS bundle diet, image/font optimizatio

  2026-04-15 · 7 min read #performance#core-web-vitals#lcp#cls#inp

• Complete Guide to CDN & Edge Caching Strategies 2025: Cache Invalidation, ETag, Stale-While-Revalidate

  Everything about CDNs and caching. HTTP cache headers (Cache-Control/ETag/Vary), how CDNs work, edge caching, the hard problem of cache invalidation (one of the two hard problems), Stale-While-Revalidate, and a compariso

  2026-04-15 · 14 min read #cdn#cache#edge-computing#http-cache#cache-invalidation

• CDN and Edge Computing Deep Dive — Anycast, Cache Invalidation, DDoS Defense, Lambda@Edge vs Workers vs Compute

  From Akamai in 1998 to 2025 edge computing. The magic of Anycast, cache tier design, the philosophy of cache invalidation, the three-layer DDoS defense, and an architecture comparison of Lambda@Edge vs Cloudflare Workers

  2026-04-15 · 14 min read #cdn#edge-computing#cloudflare#akamai#fastly

• Web Performance Optimization Complete Guide 2025: Core Web Vitals, LCP/INP/CLS, Loading Strategies ♪ Listenable

  Everything about web performance optimization! Core Web Vitals (LCP/INP/CLS), image optimization (WebP/AVIF/lazy), bundle optimization (Tree Shaking/Code Splitting/Dynamic Import), caching strategies (Service Worker/CDN/

  2026-04-14 · 22 min read #web-performance#core-web-vitals#lcp#inp#cls

• System Design Interview Complete Guide 2025: Scalable Architecture, Availability, and Design Patterns ♪ Listenable

  Everything about system design interviews! 4-step framework, scalability (horizontal/vertical), load balancing, caching (Redis/CDN), DB sharding, CAP theorem, message queues, real-world designs (URL Shortener/Twitter/Net

  2026-03-25 · 21 min read #system-design#scalability#availability#load-balancing#caching

• Web Performance Optimization Complete Guide 2025: Core Web Vitals, Loading Strategies, and Rendering Patterns

  Everything about web performance! Core Web Vitals (LCP/CLS/INP) optimization, image/font/JS optimization, Code Splitting, Tree Shaking, Service Worker, CDN, rendering patterns (SSR/SSG/ISR/Streaming), and achieving a Lig

  2026-03-23 · 22 min read #web-performance#core-web-vitals#lcp#cls#inp

• Networking Fundamentals Every Developer Must Know: TCP/IP, HTTP, DNS, TLS to gRPC and WebSocket ♪ Listenable

  A comprehensive guide to networking fundamentals every developer must know. From the TCP/IP 4-layer model, HTTP/1.1 vs 2 vs 3, DNS resolution, TLS handshakes, gRPC, WebSocket, CDN, to load balancers — a practical guide y

  2026-03-23 · 27 min read #networking#tcp-ip#http#dns#tls