Zero-JS Wasn't Enough: Edge Caching SSR HTML on Cloudflare Workers
The previous article ended with a confession: same build, two PageSpeed runs two hours apart, desktop Performance 99 and then 90. I blamed first-scree…
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Devlog: Performance Optimization Lessons from ADHD App Beta Testing
TL;DR: The biggest performance and reliability work was not a fancy animation pass. It was fixing the task recommendation pipeline: removing non-trans…
Нагрузочное тестирование в 2026: почему спрос растёт, а специалистов всё ещё нет
Я провёл несколько лет в роли Leadа нагрузочного тестирования. И если честно, долгое время это была специализация из разряда “да зачем оно надо, это в…
How We Saved Big and Simplified Our Image Pipeline: Adopting bunny.net on DEV
Hey everyone, Ben here. If you’ve been following the journey of DEV and our open source project Forem , you know we’ve always been obsessed with web p…
The Silent Performance Killer in Rails: Understanding and Fixing N+1 Queries
If you've ever investigated a slow Rails endpoint, chances are you've encountered one of the most common performance problems in the Rails ecosystem: …
Tackling Performance Bottlenecks in Full-Stack Development: A Senior Engineer’s Guide
As a full-stack product engineer, one of the most persistent challenges I face is managing performance bottlenecks that arise between frontend, backen…
Why recording video in the browser is harder than it looks
Hey folks! In this article, I want to share our experience building a screen recorder inside the browser. The product is Browser Recorder , a Chrome e…
Unity UGUI Optimization: Why Rendering.UpdateBatches Can Cost More Than Your Combat Scene
Intro A high Rendering.UpdateBatches cost in Unity’s UGUI often signals excessive SyncTransform activity. This article breaks down how TransformDirty …
Why most AI apps fail in production (not in demos)
A demo is a story. Production is a stress test. I’ve seen AI apps that feel like magic on a laptop… then crash the moment 10 users show up. Why? Laten…
UUID vs ULID vs NanoID: Which Identifier Should You Use in 2026?
A few years ago, choosing an ID format was easy. Most of us generated a UUID, stored it in the database, and moved on. Today things are different. Mod…
Every elevator has a load plate. Tests are supposed to kill fear, not feed it.
Every elevator has a small metal plate near the doors: 8 persons — 630 kg . It doesn't mean the car snaps at the ninth person. It means an engineer lo…
Starving the Garbage Collector: A Pragmatic Guide to Zero-Allocation C#
Over the last few weeks, I’ve open-sourced a suite of high-performance, zero-dependency C# engines. This includes a native DataFrame library ( Glacier…
Approval Is Not Enough: Building a Sub‑Microsecond Runtime Governance Gate in Rust
Most AI governance systems check approval once. Then they assume the agent is still authorised to act. That assumption fails silently. Policy changes.…
Smart Query-Aware Cache Invalidation: Solving Mongoose Performance at Scale
The Mongoose Caching Problem (And How We Solved It) From 300 RPS to 700+ RPS: A 2.2x Performance Breakthrough When you're building a Node.js applicati…
Image Optimization for Modern Web Applications: Formats, CDNs, Automation
Images account for 50-70% of a typical web page's weight. Optimizing them properly — choosing the right format, generating responsive sizes, automatin…
Why We Rebuilt Our Magento Checkout with React: Performance Results
Magento's default Luma checkout loads a heavy Knockout.js stack, dozens of RequireJS modules, and payment iframes that fight for the main thread. For …
WASM SIMD by example: 16 RGB pixels to grayscale per instruction
I finally understood WASM SIMD by writing a real kernel: RGB → grayscale luma, 16 pixels per instruction instead of one at a time. Same math, ~4× fast…
Next.js + Supabase Performance Optimization: From Slow to Lightning Fast
Next.js + Supabase Performance Optimization: From Slow to Lightning Fast Last month, I optimized a Next.js + Supabase application that was frustrating…
Mobile Game Power Optimization: Why 30 FPS vs 60 FPS Can Double Energy Usage (Real Data Breakdown)
Introduction Real-world mobile game power consumption varies significantly across rendering complexity, frame rate, and device workload distribution. …
Cколько железа нужно ИИ-агенту? Как мы считали ресурсы для on-premise LLM и почему калькуляторы ошиблись в 5 раз
На связи Сергей Смирнов, AI-инженер и основатель LLMStart.ru. Один из самых частых вопросов от бизнеса: «Сколько и какого железа нужно, чтобы разверну…
How I Built an AI-Powered Adult (Porn) Content Scanner for Windows (And the Engineering Challenges I Didn't Expect)
Building an AI-Powered Content Scanner for Windows: Performance, Multithreading and GPU Acceleration in .NET Building software always looks straightfo…
What Is the Difference Between Functional, Performance, and Security API Testing
Three distinct questions, three distinct disciplines and confusing them is how bugs, outages, and breaches get through. Most teams start with one type…
MTP Isn't Always a Win: 1.95x on My 3090, but Speculative Decoding Is Hardware-Dependent
In my MTP post , speculative decoding roughly doubled Qwen3.6-27B generation on a 3090. It's tempting to read that as "turn on MTP, go faster." So I m…
How a pure-Python jq ended up 40x faster than the C bindings
I spent yesterday building purejq , a pure-Python implementation of jq. I expected it to be the slow-but-portable option. Then I benchmarked it agains…
Laravel `Bus::bulk()`: Faster Dispatch, Harder Queue Tradeoffs
Bus::bulk() is not a fancy alias for dispatch() in a loop, and it is definitely not a lighter Bus::batch() . In Laravel 13, it is a lower-level dispat…
How Databases Impact System Scalability and Speed in Software Engineering
Databases are core to most software systems, and their design directly influences both scalability and performance. Here’s what every engineer should …
Rails Performance Optimization: Fixing N+1 Queries with includes, preload, and eager_load
Originally published on Hashnode: https://railswithyashika.hashnode.dev/rails-performance-n-plus-one-queries When working with associations in Rails, …
How I made cssnano ~30% faster
Introduction In 2025 I started contributing to cssnano , the CSS minifier that runs at the end of a lot of build pipelines. If you use PostCSS, there'…
Breaking the 100k Row Limit: Building High-Performance Dynamic Grids with VyncCanvasScroll in Vue 3
The Million-Row Challenge in Modern Web Apps When dealing with massive enterprise datasets—like Amazon SKU multi-account performance metrics or high-f…
Cache Deep Dive III — Replacement Policies, Prefetch, and Single-Thread Memory Access
The previous article discussed the static structure of caches. This part moves into dynamic aspects: when a program continuously issues read requests,…