TypeScript Weekly

Issue #201 — March 24, 2025

A 10x Faster TypeScript — Announcement

In case you missed last week’s issue, I’m including the big announcement from The TypeScript team again — they have been porting the TypeScript compiler and language service (which are currently written in TypeScript itself) to a native Go implementation. The performance improvements are significant: 10x faster type checking and significantly less memory usage. See Why Go? for more details on why the team chose Go over other languages (such as C# or Rust).

Anders Hejlsberg

Anders Hejlsberg on TypeScript’s Go Port — Interview

Matt Pocock is chatting with Anders Hejlsberg about the Go port of the TypeScript compiler. Anders explains how the 10x speedup is achieved via native code execution and concurrency. He also talks about future optimizations, erasable syntax, and opportunities that this new performance budget unlocks.

Matt Pocock

Real-World Uses of TypeScript’s Utility Types

Sam Rose walks us through some real-world usage of TypeScript’s utility types in their day job’s open source codebase to help those new to the language get to grips with this key capability.

Sam Rose

TypeScript: the satisfies operator

TypeScript’s satisfies operator lets us check the type of a value (mostly) without influencing it. In this blog post, we examine how exactly it works and where it’s useful.

Dr. Axel Rauschmayer