When LCP Moves and Nobody Deployed: Browser Release Cadence and Your 28-Day Field Window
Field Largest Contentful Paint in PageSpeed Insights can move while your release calendar stays empty. Chrome User Experience Report (CrUX) data is…
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Is PageSpeed Insights a good reference for web page structure/performance?
PageSpeed Insights (PSI) answers a narrow question well and a broad one poorly. It is a good reference for how a URL performs under a controlled lab…
Are websites still relevant today for the average person?
The average person does not wake up choosing between "website" and "no website." They choose between opening an app, asking ChatGPT, tapping a map r…
Adaptive PNG filtering made my animations 2.4x bigger
I added adaptive per-scanline filtering to an APNG encoder, because that is what you are supposed to do. PNG lets every row pick one of five filters…
A GIF re-encode made the file 4.5x bigger. Interframe differencing fixed it.
Cropping a GIF should not make it bigger. Ours did, and not by a little: a 288-frame Foucault pendulum went from 1074 KB in to 4881 KB out, and a 70…
INP Bukan Masalah Hosting: Cara Mengaudit dan Menjinakkan Script Pihak Ketiga di Situs Bisnis
Setiap kali skor Core Web Vitals memerah, percakapan di ruang rapat hampir selalu berbelok ke arah yang sama. Ganti hosting. Naikkan RAM. Pindah ke…
The End of useMemo: React Compiler in Next.js
The Exhausting Re-Render Crisis For the past decade, building highly interactive React applications has been a delicate balancing act. React’s core…
How We Optimized Next.js 15 for 70,000+ High-Res 4K Wallpapers (Without Melting the Edge)
When we set out to build Zenith Walls , we made a promise: we were going to serve pristine, uncompromised 4K and 8K wallpapers — crisp enough for ul…
TTFB Won't Go Down? Server-Side Culprits Beyond the Theme
You moved the site behind a CDN, trimmed the theme, deferred scripts, and ran a caching plugin. PageSpeed Insights still flags a high Time to First…
Stop Polling: Real-Time SSE Architecture in Next.js 📡
The Polling Anti-Pattern In modern enterprise applications, users expect real-time data. Whether it is a live trading dashboard, a server health mon…
What happens when you upload a PDF online
Disclosure: I build UMyPDF , a browser-based PDF toolkit, which comes up at the end of this post. The explanation applies to any tool built either w…
Your store weighs 1.7 MB and still takes 18 seconds: the number that matters is 364 requests
Page weight is the number everyone checks, and it is the reason this store has been slow for months without anyone finding out why. I measured a Sho…
Why your Wix site feels slow: 4.9 MB of HTML before a single image, and which half you can actually fix
A store owner posted that his Wix site took about six seconds before it responded to anything. He had already done the obvious: converted images to…
Zero Latency UX: Optimistic UI in Next.js ⚡
Liquid syntax error: Variable '{{% raw %}' was not properly terminated with regexp: /\}\}/
How I cut a 1.1 GB image gallery to 30 MB without touching a single database row
I run a small AI-photo-prompt gallery — a few hundred prompts, each with an example image. It started as a weekend project and grew faster than the…
Demystifying Next.js Caching Strategies ⚡
The Complexity of the App Router When Vercel introduced the Next.js App Router, it brought unprecedented power through React Server Components. Howe…
How We Cut Our Homepage TTFB from 800ms to Under 200ms (and Refreshed the Hero While We Were At It)
How We Cut Our Homepage TTFB from 800ms to Under 200ms (and Refreshed the Hero While We Were At It) Our homepage was fine. It loaded. It had words o…
AVIF vs WebP vs JPEG: Real Benchmarks (2026)
I compressed 100 photos through 3 formats. Here's the actual data. A 2MB JPEG photo. Convert it to WebP — now it's 480KB. Convert it to AVIF — now i…
There was no independent, measured view of AI-API latency by region — so I built one
If you build anything on top of hosted AI APIs, latency isn't a detail you get to ignore — it's a feature. A sluggish time-to-first-token is the dif…
A 100% client-side toolbox: shipping 17 calculators with no backend
Doing video work in the browser sounds like a compromise — until you realize the alternative is uploading proprietary footage and delivery specs to…
Engineering for Speed: Lessons from ReBALKAN’s Four-Platform Performance Tests
A multilingual marketplace has a performance problem before it has traffic. Every additional language can introduce new templates, fonts, assets, ro…
Building High-Performance Martial Arts E-Commerce Stores: A Developer's Guide
Why Martial Arts Retailers Need Technical Excellence Martial arts equipment stores represent a niche but growing e-commerce segment. From specialty…
How We Turned a High-Traffic News Site's Core Web Vitals from Red to Green
The setup: a news site where every millisecond is public Kapital.kz is one of Kazakhstan's high-traffic business and finance news portals, built on…
Convert a whole folder of images to WebP — locally, no upload, one command
Every few months I hit the same wall: a folder full of .jpg and .png files that need to be WebP before they go anywhere near production. And every f…
Day 127 of Learning MERN Stack
Hello Dev Community! 👋 It is officially Day 127 of my software engineering marathon! Today, I leveled up my asynchronous data pipeline in React.js b…
Stop API Spam: Debouncing React Inputs ⚡
The Live Search DDoS Live search inputs are a staple of modern B2B dashboards at Smart Tech Devs. As the user types into the "Find Client" box, the…
Stop Auth Flickers: Edge Middleware in Next.js ⚡
The Amateur UI Flicker When building protected routes (like /dashboard ) in a React Single Page Application (SPA), developers usually handle authent…
Fix Core Web Vitals: Offload Scripts with Partytown ⚡
Liquid syntax error: Variable '{{% raw %}' was not properly terminated with regexp: /\}\}/
🚀 Introducing Prism Guard — An Open Source Frontend Architecture Intelligence Platform
Every engineering team has experienced this. The codebase starts clean. A few months later... Components become 500+ lines long. Anonymous component…
Fix Web Performance Issues Faster with Modern Web Guidance and Chrome DevTools for AI Agents
Performance optimization has always been one of the hardest parts of web development. You run Lighthouse, record a Performance trace, identify a lon…