Web

Building a static repository for print-perfect PDFs

Most print-ready websites are slow, bloated, and covered in ads. I wanted to build a clean directory for paper templates that loads instantly and prin…

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…

Building a Low-Latency Polymarket Bot for Earnings Markets: A Real-World Attempt (Lessons & Technical Breakdown)

A bot on Polymarket quietly extracted $32k in near risk-free profits by sniping “Will Company XYZ Beat Earnings?” markets. It waits for the official r…

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 …

Clojure is almost as fast as C (with some help)

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…

Comparison and Benchmarking of Rust Decimal Crates

Memory Leaks in Python and How to Overcome Them

Python is known for being simple, readable, and developer-friendly. One of its biggest advantages is automatic memory management, which means develope…

The Deep Mechanics of Online Bulk Deletion in PostgreSQL

MVCC, WAL, vacuum, and replication slots under sustained delete load - and how to delete billions of rows without your database noticing Most "how to …

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…

Write-heavy sysbench tests, a large server, modern Postgres and MySQL

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…

Edge Computing in the Browser: How I Replaced a Backend Server with Web Workers & WASM

The obsession with centralizing heavy compute on backend servers is a massive bottleneck for both cost and latency. In 2026, as more applications move…

Magento 2 EAV Performance Deep Dive: Optimizing the Entity-Attribute-Value Model

The Entity-Attribute-Value (EAV) model is both Magento's greatest strength and its most persistent performance bottleneck. It gives you unlimited flex…

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…

WebAssembly turned my "static" site into a zero-backend app platform

For the longest time I treated "static site" and "does real work" as mutually exclusive. Static meant brochureware. Anything heavier like resizing an …

Engineering Resilience: Two Lessons from Building Under Pressure

A reflection on performance optimization at scale and building reliability mechanisms; two tasks that defined my internship. Every engineering interns…

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…

How to Keep Your Website Fast When Using Custom Fonts

Custom fonts look great, but they can easily slow down your website if they aren't optimized. Large font files increase loading times and cause unexpe…

HTML-First Websites Are Quietly Winning Again in 2026

TL;DR: HTML-first means shipping real, server-rendered content before any JavaScript runs, then adding scripts only where they earn their place. In 20…

Token Cost Optimization: How to Cut LLM Inference Spend Without Cutting Quality

There is a version of token cost optimization that I do not recommend: cutting token counts by reducing the quality of your system prompt, your retrie…

Streaming 25 Million Excel Cells Through 7 MB of Memory

Streaming 25 Million Excel Cells Through 7 MB of Memory TL;DR: I built an export pipeline that streams 15M+ records as formatted Excel files inside ZI…