How Hard Is It To Open a File?

It’s a question I had to ask myself multiple times over the last few months. Depending on the context the answer can be: very simple, just call the standard library function extremely hard, don’t trust anything If you are an app developer, you’re lucky and it’s almost always the first answer. If you develop something with a security boundary which involves files in any way, the correct answer is very likely the second one.

Optimizing Ruby Path Methods

Back in November last year, I started a new job at Intercom, and one of the first projects I got to work on was improving the Intercom monolith CI with some of my new colleagues.

Are LLMs not getting better?

Code Is Cheap Now. Software Isn’t.

The barrier to entry for building software has collapsed. The barrier to building something that matters hasn’t moved an inch.

Test, don't (just) verify

Pain points of OCaml

Pre-record your demos

Meta was in the news recently for two failed live demos: Mark Zuckerberg's Meta AI glasses demo failed in EPIC fashion today 🤣pic.twitter.com/O0UFeoCar7 — Chief Nerd (@TheChiefNerd) September 18, 2025 Meta AI's live demo failed for the entire minute 😢 pic.twitter.com/du4roaW0ER — near (@nearcyan) September 18, 2025

Behind The Scenes of Bun Install

Learn how Bun is able to cut install times by up to 25×. Bun skips Node.js's overhead with direct system calls, cache-friendly data layouts, OS-level copy-on-write, and full-core parallelism.