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Verifying a white background programmatically (and the two export mistakes it catches)

Marketplace image checks are usually automated, and "looks white" is not the same as "is 255,255,255". If you process product photos in a browser, t…

Four full reads of a 4 MB text file to decide one listing, on the thread that serves our UI

Notifio watches rental searches and tells you when a listing appears. With the auto-reply upgrade it can also fill in that site's contact form for y…

Deep‑link navigation in Expo Router exceeding the performance budget

The situation You are a senior mobile engineer on a React Native team that ships a consumer‑facing app with Expo SDK 50 and expo‑router 2.0.0. The p…

Why We Built a Zero-Upload, 100% Client-Side Web Utility Suite published: true tags: webdev, javascript, canvas, performance

When handling image optimization or PDF manipulation, the industry standard has long been server-side processing: upload the file, process it via FF…

5 quick checks to make a website load faster

A slow website loses visitors before they read a single word. Here are five checks I run on almost every site, in the order I do them. None need spe…

Database Optimization: Beyond the Basics

We've all been there: a perfectly good application, humming along, suddenly grinds to a halt. The culprit? Often, it's the database. While throwing…

Game Optimization Methodology, or How 3 Days of Building a Test Harness Gave Me More FPS Than a Month of Writing Code

About me I'm a mobile game developer. Most of my work is gameplay programming and building tools for development teams. I like Lua, C++, Godot, and…

My PostgreSQL Database Went from 139 GB to 29 GB. Here's Why.

Background Recently I was migrating our databases from RDS to Snowflake Postgres . I was using pg_dump and pg_restore to take a dump of source datab…

Your CDN says HIT. Here's what that doesn't tell you

x-cache: HIT feels like a finished job. The edge answered, the origin rested, done. But a HIT only tells you one thing: this particular edge node ha…

Core Web Vitals in Practice: Fix LCP, INP, and CLS Without Guessing

Core Web Vitals is one of the most searched topics in technical SEO, and one of the most misunderstood. Teams run a Lighthouse test, see a red score…

Startup‑time regression: deciding if a Hermes rewrite is worth it

The situation You are a senior mobile engineer on a React‑Native team that just upgraded the JavaScript engine from JSC to Hermes (React‑Native 0.71…

Repeat visitors shouldn't re-download your logo: Cache-Control headers for small-business sites in 10 minutes

Every time someone opens your site a second time, their browser asks: "do I still have a good copy of this logo, this CSS, this font?" If your serve…

10 Practical Ways to Make Your Smartphone Faster and Extend Its Life

Smartphones have become essential tools for communication, learning, work, and entertainment. However, over time, many users notice that their devic…

When a Fabric rewrite feels faster but you can’t prove it

The situation Say you are a React Native engineer on a mobile team that has just upgraded the UI stack from the legacy renderer to the new Fabric re…

A Very Fast IPv4 Parser, in Swift

WebGPU ran our in-browser cutout 6x faster, and drew the wrong mask

Our background remover runs a BiRefNet model inside the visitor's browser with ONNX Runtime Web. For a while the free tier used WebGPU when it was t…

How I cut my AI inference bill by 80% - moving from OpenAI to self-hosted models

My OpenAI bill was $400/month. After moving to self-hosted models on a single Hetzner GPU box, it's $80/month and falling. Here's the playbook. The…

NAS mount vs rclone vs WebDAV clients compared

I tested 4 WebDAV clients against rclone mount on Windows. Here's the speed, the quirks, and which one I'd actually use. TL;DR If you want native dr…

Optimizing Gaming Gear for Competitive CS Players Using Pro Match and FACEIT Pug Performance Data

Introduction: Unlocking the Gear Advantage in Competitive CS In the high-stakes world of Counter-Strike, where milliseconds matter and precision is…

From 100 Million Events to 1,200 Pixels: Engineering a Data-Heavy Dashboard

Your dashboard has a chart that is about 1,200 pixels wide. Behind it sits a table that grows by a few million rows a day. Somebody opens the page,…

Your Free Tier Has a Concurrency Knee. Go Find It.

The free endpoint didn't fail me with a wrong answer. It failed me with a right answer, eleven seconds late, and that is a much harder bug to notice…

Crawlers, floods and fleets: a year of keeping our digital collections open

Claude Code Added GZIP in 2026. Why Not Brotli?

A developer captured a Claude Code API request that was 594,750 bytes . After GZIP compression, the body was 289,145 bytes . That's about 51% less d…

cutting N+1 queries in Next.js API routes with Supabase RPC

when a dashboard starts pulling relational data from Supabase, the naive approach is to fire a separate select per row. the result is a classic N+1…

Enforcing a concrete performance budget for Expo EAS builds and OTA updates

The situation Say you are a mobile engineer on a small React‑Native team that uses Expo Application Services (EAS) for CI‑driven builds and over‑the…

Écrire un article sur les Web Workers en JavaScript

Debouncing vs. Throttling in JavaScript: How to Choose JavaScript interfaces often receive events faster than they need to perform useful work. A se…

why pg‑bouncer can still choke your service under burst load

problem statement in a typical microservice, each instance opens its own pg client pool. during a traffic spike the aggregate connection count can e…

Context-Mode: Output Sandboxing for AI Agent Token Efficiency

AI agents are powerful, but their verbose tool outputs often bloat context windows, driving up API costs and hindering performance. Every time an ag…

Interrupted Runs Belong in the Denominator

A benchmark score that quietly drops interrupted runs is not a conservative score; it is a score whose hardest cases were deleted before anyone coun…

How much GPU energy does fp16 save? Measured on a Tesla T4

How much GPU energy does fp16 actually save over fp32? Spec sheets give TDP and peak FLOPS, not joules per job, so I measured it on a Tesla T4 using…