undef.dev — make · learn · takes

Machine learning, mathematics, games, language, and music.

Latest posts

Looking like nothing: surviving deep packet inspection with VLESS and REALITY

There are mainly two reasons why people use a VPN service: privacy (because you trust your VPN provider more than you trust your ISP, a network operator, or whoever is on the café wifi), or access to

Aug 11, 2026

Speculative decoding: when LLMs predict their own predictions

How do modern LLMs generate several tokens for the price of one?

Jun 26, 2026

On starting a blog, and coloring it

I'm interested in a lot of things (machine learning, math, games, languages, music) and I like sharing what I figure out along the way.

Jun 14, 2026