Programming

Epoll in Linux is the invisible piece behind Nginx, Redis, and Node.js: it lets a single thread watch thousands of sockets without looping through them one by one. This article explains how it works internally, with C and Python code, and how to verify your process is using it.

Starting October 30, 2026, Meta authorizes crawling commercial sites to train its AI. robots.txt, server rules, and Cloudflare’s native blocking are the three layers to decide which bots get into your site.

The same Go program can become five times slower just because it doesn’t read an HTTP response body. We explain why HTTP/1 breaks connection reuse so easily, and how Go 1.27 fixes it.

Iosevka is an open source monospace font with 146 configurable characters and 19 alternate styles. This guide explains how it works, when it makes sense over alternatives like Fira Code or JetBrains Mono, and how to compile your own variant with Node.js.

React Server Components let React run part of the interface exclusively on the server, without sending that code to the browser. This guide explains how they work, when to combine them with Client Components, and how to set up a real project with Next.js to try them out.

Copy-on-write is the mechanism that lets Linux, Git, Docker, and ZFS share memory and files without copying them, postponing that copy until something actually changes. This guide explains how it works internally, with code examples and commands to try it yourself.

Chess engines don’t compare the board square by square on every move: they use Zobrist hashing, a 64-bit key updated with XOR in constant time. This article explains how it works, how to implement it in Python, and why it underpins the transposition tables of engines like Stockfish.

Turbopuffer announced on September 30, 2026 that it is redesigning its storage architecture to stop relying on the vector index as its central axis. Here’s how a serverless vector database works under the hood: object storage as the source of truth and a tiered NVMe and memory cache.