2 posts tagged with "go"

TypeScript 7.1 Beta landed on October 20, 2026. When TypeScript 7.0 shipped in July, the Go-based compiler was fast but had one big gap: there was no programmatic API. 7.1 closes it. It brings a new, stable-track compiler API, a plugin point called content mappers for non-TypeScript files like .vue components, and another big round of performance work. It also adds a few language and lib features. This post covers what changed, what it unblocks, and whether you should try the beta now.

TypeScript 7.0 shipped on July 8, 2026. The compiler is now written in Go — a line-by-line port of the existing TypeScript codebase (codename "Corsa"), not a from-scratch rewrite. The result is 8–12x faster builds, dramatically faster editor responsiveness, and a language server that crashes far less often. This is the single biggest performance improvement in TypeScript's 12-year history. But it comes with real breaking changes, a missing programmatic API, and a migration path that rewards patience over haste.