Discover the unique design challenges of creating a spherical planet out of Minecraft-like blocks.

Making performant dynamic manual memory management in C feel almost like garbage collection.

Blog about linguistics, programming, and my projects

The materials for the course on compilers: built incrementally and fully in tagless-final style

Canonical plans to replace the battle tested GNU Coreutils with new, untested, Rust-based replacements. It's going as well as you'd expect.

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A work-in-progress garbage collector for Guile. Contribute to wingo/whippet development by creating an account on GitHub.

It has taken nearly two decades and an immense amount of work by millions of people for high performance computing to go mainstream with GenAI. And now,

Write your first hypervisor from scratch, in 1K LoC.

Write your first operating system from scratch, in 1K LoC.

Exploring a minimal implementation of a time-sharing kernel on RISC-V, implemented in Zig, on top of OpenSBI.

The Linux kernel has to handle many different sources of data that should not be trusted: user [...]

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There's a dichotomy between programming languages.
Some languages are…

At Johnny’s Software Lab we’ve spent a lot of time deep-diving into advanced performance topics — vectorization, cache hierarchies, memory bandwidth, you name it. But not everyone is ready to jump straight into assembly listings and microarchitectural details.…

We successfully deployed ThreadSanitizer in the Firefox project to eliminate data races in our remaining C/C++ components.