How We Cut Our Browser Video Renderer's Frame Time by 80%
How We Cut Our Browser Video Renderer's Frame Time by 80% A 30-second product promo — 1,050 frames at 1920×1080 — was rendering at roughly one frame p…
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DEV’s Big Summer Bug Smash is now LIVE! Share $5,000 in cash prizes, skateboards, and more across 20+ winners. 🐛🐞🪲
Today is National Be Nice to Bugs Day in the U.S. and we’re thrilled to launch our Big Summer Bug Smash powered by Sentry . This smashing good time in…
How I made a Rust hot path 27x faster, and the AI fix I refused to merge
Two years ago I open-sourced KeyEcho, a small desktop app that plays a mechanical-keyboard sound the instant you press a key. It got 800+ stars. Then …
Improving UX in Three.js 'Scroll Me' Websites: Addressing Common Pitfalls for Better User Engagement
Introduction: The Allure and Pitfalls of Three.js 'Scroll Me' Websites Three.js "scroll me" websites are digital marvels—visually stunning, pushing th…
Compare Cloud and On-Device AI Costs Without Inventing Energy Numbers
“On-device AI saves battery” and “cloud AI is more efficient” can both sound plausible. Neither is a measurement. The placement decision crosses at le…
How I export 1.2-gigapixel images on an iPhone without running out of memory
Rendering a big image on iOS is one of those things that looks trivial until your app gets killed by the OS mid-export. CGContext , draw, makeImage() …
Serving Agent Traffic Without Breaking Your Origin
You keep an origin healthy while staying open to AI agents by caching the cheap, near-static surfaces agents read most and reserving your compute for …
ArborDb: a Rust document store where reading one field doesn't get slower as the record grows
Most embedded document stores make you pay the same price to read one field as to read the whole record: they deserialize the entire value, then hand …
Benchmark an AI Agent Migration Without Believing One Speedup Number
Model migrations and dramatic agent speedups are recurring headlines. A single “2.2x faster” number cannot tell you whether your production workflow i…
I made an iOS app called Simmerz
Under the Hood: Why We Built an AI-Powered App Optimizer for React Native & Apple OS Runtimes Optimization is usually the last 10% of the developm…
Breeze Framework: Rethinking What a Modern Go Framework Can Be ⚡
The web has changed . Applications are no longer simple HTTP servers. Today we build real-time dashboards, AI-powered services, multiplayer systems, A…
Choose a Columnar Format From the Read Path Backward
The columnar-format ecosystem is moving quickly. Feature tables encourage teams to ask which format has the newest encoding. A system-design decision …
The benchmark that built the tools
How we measured a markdown knowledge graph as agent memory — lost to grep, rebuilt our search and editing primitives, retracted our own best number, a…
TOON: the JSON trick that cut my LLM prompt tokens by half
I run a small developer tools site, and the whole thing started with one annoyance: sending JSON arrays to GPT or Claude wastes a ridiculous amount of…
Compiling PHP DTOs: from reflection to 4.5M hydrations per second
TL;DR: attribute-driven DTOs are pleasant to write but usually pay a reflection-and-dispatch tax on every call. Simple Data Objects compiles a special…
Beyond the Cloud: Engineering "Micro-AI" on Consumer Hardware
Beyond the Cloud: Engineering "Micro-AI" on Consumer Hardware In the current landscape, "AI" has become synonymous with massive cloud farms and "black…
React Compiler in 2026: What It Actually Memoizes (And What It Doesn't)
Headline: React Compiler — formerly React Forget — shipped stable with React 19 and automatically memoizes components, hooks, and callbacks by ana…
Partial Prerendering in Next.js: The Static Shell + Dynamic Stream Model
Headline: Partial Prerendering (PPR) in Next.js serves a static HTML shell from the CDN edge instantly, then streams Suspense-wrapped dynamic children…
I Got 9.9 Lower TTFT on a Real Android Phone by Reusing llama.cpp KV State
Local LLM inference has an expensive habit: It recomputes prefixes it has already seen. A system prompt. A reused RAG document. A few-shot block. A lo…
Next.js ISR and On-Demand Revalidation — Caching Without Staleness
Incremental Static Regeneration (ISR) is one of the more powerful caching strategies in Next.js — and one that's often misconfigured in ways that eith…
How I Took a Site From 69 to 96 on PageSpeed by Fixing One Script Tag
I run a small Next.js site (free browser-based file conversion tools). Yesterday I ran PageSpeed Insights on mobile and got a 69 — "needs improvement,…
Vite 8's Rolldown Makes Builds 13x Faster, Not the Dev Server
When a new version ships, I usually just type npm install and move on. But installing Vite 8 and looking inside node_modules made me stop for a second…
Execution Latency in My Polymarket Trading Bot - Sub-Second Trade Execution System Design
Speed on Polymarket is not what I thought it was when I started building this. I assumed faster was always better. Get the signal, fire the order, win…