By Daniel Curtis
Publication Date: 2026-01-12 17:00:00
Microsoft has shared a progress update on TypeScript 7, codenamed Project Corsa, revealing a fundamental transformation of the TypeScript compiler. The update, published in December 2025, details the team’s ambitious rewrite of the TypeScript compiler in Go, promising performance improvements of up to 10x faster build times and significantly reduced memory usage.
The new native compiler, called tsgo, leverages Go’s performance characteristics to deliver substantial speed improvements. According to the TypeScript team, full builds can be up to 10x faster compared to previous versions, with efficient parallel processing capabilities for multiple projects. The native language service, which powers editor features like completions, definitions, and refactoring, is largely stable and available for daily use.
It is possible to try out the new preview now:
npm install -g @typescript/native-preview
One of the most significant changes in TypeScript 7 is the decision to…