Database Transaction Isolation: 5 Concurrency Bugs and How to Fix Them
Your code works alone, then two users act at once and a balance goes wrong. This guide shows five classic concurrency bugs as timelines, wha...
Oct 31, 2026
8 min
Concurrency: Threads, Processes, and asyncio (and Why LLM Apps Love Async)
Calling a model 100 times one by one is painfully slow. This post explains I/O-bound versus CPU-bound work, the GIL, threads, processes, and...
Oct 24, 2026
12 min
Python asyncio from Scratch
Most asyncio tutorials start with syntax. This one starts with the problem. Once you see why your program spends most of its time waiting, c...
Sep 28, 2026
4 min
The Node.js Event Loop Is Not Magic — It's a Contract
Every Node.js performance problem is either an event loop violation or a consequence of one. This is the guide to understanding the contract...
Jun 10, 2026
11 min