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TypeScript 7 RC ships with Go-based compiler delivering 10x speed improvements

@jatnieldev

13d ago· 5 min readenNews

technology programming

Summary

Microsoft has shipped TypeScript 7 Release Candidate, with the major change being that the entire compiler has been rewritten in Go instead of TypeScript/JavaScript. This rewrite delivers approximately 10x performance improvements. The migration was done methodically from the existing codebase, preserving identical type-checking logic to TypeScript 6, so developers don't need to change how they write TypeScript. The stable release is expected next month.

Source

Hacker NewsTypeScript 7 RC ships with Go-based compiler delivering 10x speed improvementsjatniel.dev

Key quotes

· 4 pulled

It's that the entire compiler has been rewritten in Go.

Over the past year, the team ported the existing codebase (until now, TypeScript that compiled to JavaScript) to Go.

It was done methodically from the current implementation, not rewritten from scratch, so the type-checking logic stays structurally identical to TypeScript 6.

You don't change how you write TypeScript, you just get more speed.

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TypeScript 7 RC is here: the compiler now runs on Go, around 10x faster, plus how to migrate without breaking anything.

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