Simon Willison 12/17/2025

ty: An extremely fast Python type checker and LSP

Read Original

Astral has released the first beta of 'ty', a new Python type checker and LSP. It claims to be 10x to 60x faster than mypy and Pyright without caching, and up to 500x faster in editor scenarios. The article covers initial performance benchmarks, how to try it via uvx, and the release of a companion VS Code extension.

ty: An extremely fast Python type checker and LSP

Comments

No comments yet

Be the first to share your thoughts!

Browser Extension

Get instant access to AllDevBlogs from your browser

Top of the Week

2
Designing Design Systems
TkDodo Dominik Dorfmeister 2 votes
4
Introducing RSC Explorer
Dan Abramov 1 votes
6
Fragments Dec 11
Martin Fowler 1 votes
7
Adding Type Hints to my Blog
Daniel Feldroy 1 votes
8
Refactoring English: Month 12
Michael Lynch 1 votes
10