David Álvarez Rosa

¹ ‎  Hi! This is my personal site, where I share notes on software and self-hosting. You’ll learn how things work under the hood, and how to make them run fast, very fast.

I’m a mathematician and engineer based in sunny Dublin, passionate about low-latency, high-performance systems. I’m a strong advocate of free (as in freedom) software, and a devoted Emacs user.

Find me on GitHub, GitLab, and LinkedIn.

Recent Posts §

July 16, 2026 One Hundred Thousand Reads
This site just passed one hundred thousand reads. It started as a public notebook that almost no one read. The plan hasn’t changed: one post a …

June 25, 2026 performance Tuning a Server for Benchmarking
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. Yet on …

June 1, 2026 self-hosting Self-Hosting on the Dark Web
This site is now reachable over Tor as a hidden service, at a .onion address that resolves only inside the Tor network. Tor relays and encrypts your …

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Have feedback? Email me at david@alvarezrosa.com.