Microsoft has released TypeScript 7 RC with a stable compiler built in Go, promising a 10x speed increase over the previous version. The upgrade, now in release candidate form, maintains TypeScript 6’s typing structure while delivering faster builds thanks to Go’s native compilation and parallel processing. Engineers note the changes are subtle for developers—fewer errors, quicker edits, and smoother editor responses.

The move underscores a strategic shift, ensuring long-term compatibility with modern tools like LSP and TypeScript 6. Teams are advised to test before full adoption, as some utilities may require adjustments. This release marks a pivotal step toward performance without breaking existing projects.