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TypeScript 7.0 Launches with Go-Rewritten Compiler, Up to 17x Faster Builds

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Microsoft has released TypeScript 7.0 as a stable version, featuring a compiler fully rewritten in Go to leverage native code execution, multithreading, and improved parallelization. The new compiler delivers build speed improvements of 8x to 12x on large projects, with VS Code's build time dropping from 125.7 seconds to 10.6 seconds in benchmarks. Memory usage also improved, falling by 6% to 26% across tested projects. TypeScript 7.0 includes a new LSP-based language server that significantly speeds up editor features such as autocomplete, error diagnostics, and code navigation. The release has been tested for over a year by major companies including Slack, Canva, Figma, and Vercel, with Slack reporting CI type-checking time cut from 7.5 minutes to 1.25 minutes.

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