Killing a `Cow` made my JSON formatter 42% faster
Early optimization is bad
Jacob Asper
Rust is a must 🦀
Latest posts
How do formatters work?
What is a formatter and how does it worK?
LLMs don't own em dashes—I do
stop AI accusing people who use em dashes
How I read technical books and documentation
Don't skip out on a book just because it's long!
Committing to learning Go in 2026
Time to learn Golanguage
Rust's `'static` doesn't imply memory leaks
Leaking memory is one way to get a value living for `'static`, but it's not the only way
JSON WTF - Jacob Asper
A totally normal and not hard quiz about JSON
It takes 26 yottabytes of RAM to typecheck a union of Safe Integers
Sometimes `number` is good enough
TypeScript Type Level Addition
Metaprogramming and type level shennanigans
IIFEs — a JavaScript Idiom of Yore
IIFEs were very useful back in the day, but modern JavaScript has made them irrelevant
JavaScript Holes and Tolls (on performance)
Compiler optimizations that you shouldn't worry about but are cool
Upgrading to Tailwind v4
Upgrading my blog to Tailwind v4
We should replace FIFA with a bunch of roundabouts
It's really fun to go in circles
Do It
Do It
Detail Oriented? I Will Atomize Your Resume
Buzzwords are the bane of my existence
Variables in Rust - Rust for TypeScript Developers
Learn about the differences in scope, initialization, and declaration for variables in TypeScript and Rust
Pulling changes from forked repositories
Imagine this—you are working on a feature in an open–source GitHub repo with a few others. You don't have write access, so you will need to make forks. If everyone is comfortable, one person can make a fork and give everyone else write access, but that's not always the easy to coordinate
Implement `Pick` in TypeScript
Implement `Pick` in TypeScript without any Utility Types!