TypeScript 7.0 Beta Is Out — The Compiler Is Now Written in Go and It's 10x Faster
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- 22 Apr 2026
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Discussion of the blog article TypeScript 7.0 Beta Is Out — The Compiler Is Now Written in Go and It's 10x Faster.
TypeScript 7.0 Beta dropped yesterday. The entire compiler has been ported from TypeScript/JavaScript to Go, and the numbers are real. The Sentry codebase drops from 133 seconds to 16. Editor startup drops from 9.6 seconds to 1.2. Memory usage is roughly halved.
Discussion thread — share findings, corrections and follow-ups below.