tsz
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
Why people recommend it
“Congrats to the team on getting this out”
“such as this project which is converting tsgo to Rust, also with LLMs.”
Show 3 more
“This is awesome.”
“This is the philosophy of the Sound Mode in tsz.”
“This is way more important: https://tsz.dev/sound-mode/”
Caveats and dissent
“found it to be a deoptimisation”
Often compared with
From the makers not counted in the ranking
“In my project I'm also getting good results (for now on single files)”
“tsz's goal is to match tsc (tsgo) but perform better”
“I'm writing a TypeScript checker in Rust. It's not a port. I made this with a different architecture”
“My point of working on tsz is to learn how to do very big projects with AI.”
“In my project I let the agents communicate in GitHub issues”
“Currently tsz passes nearly 100% of TypeScript tests”
Threads where it came up
- Bun Rust rewrite: "codebase fails basic miri checks, allows for UB in safe rust" 4 mentions
- Perry Compiles TypeScript directly to executables using SWC and LLVM 2 mentions
- Rewrite Bun in Rust has been merged 2 mentions
- Ask HN: What Are You Working On? (May 2026) 2 mentions
- Bun's experimental Rust rewrite hits 99.8% test compatibility on Linux x64 glibc 2 mentions
- tsz: a performance-first TypeScript checker 2 mentions
Data: tsz.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 7
“Congrats to the team on getting this out”
“now I'm trying it”
“such as this project which is converting tsgo to Rust, also with LLMs.”
“This is awesome.”
“found it to be a deoptimisation”
“This is the philosophy of the Sound Mode in tsz.”
“This is way more important: https://tsz.dev/sound-mode/”