David Álvarez Rosa

There is nothing more satisfying than owning, end to end, the software and the hardware you use without relying on abusive cloud corporations.

A spin-lock is a lock that never sleeps.

This site just passed one hundred thousand reads.

Optimizing code starts with measuring it, and a measurement is only useful if it is repeatable: a 2% improvement is invisible under 5% of noise.

This site is now reachable over Tor as a hidden service, at a .onion address that resolves only inside the Tor network.1 Tor relays and encrypts your traffic as it passes through thousands of volunteer-run servers, so that no single party can link who you…

Over the last decade I’ve been playing with dozens of servers from multiple providers.

Although the notion of area is intuitive, its mathematical treatment requires a rigorous definition.

A single-producer single-consumer (SPSC) queue is a great example of how far constraints can take a design.

Ever looked at std::any and wondered what’s going on behind the scenes?

Ever wondered why your “clean” polymorphic design underperforms in benchmarks?

After nearly a decade, I’ve rebuilt my personal site from scratch—a blog on software, self-hosting, and lessons learned along the way.