TypeScript 7.0 Is Here: The Compiler Is Much Faster

Short summary

TypeScript 7.0 ships with a compiler rewritten in Go, delivering 8-12x faster builds and type checking on large projects while reducing memory usage by 6-26%. The new LSP-based language server cuts editor diagnostics from 17.5 seconds to under 1.3 seconds on the VS Code repo, with companies like Slack and Canva reporting major CI time savings. A stable programmatic API is deferred to 7.1, so tools like Vue, Astro, and typescript-eslint should run TS6 and TS7 side by side for now.

• •TypeScript 7.0 compiler rewritten in Go, 8-12x faster builds with lower memory usage
• •New LSP language server dramatically improves editor feedback loops on large codebases
• •Stable programmatic API delayed to 7.1; run TS6 and TS7 side by side for framework compatibility

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