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📣 TypeScript 7's Release Candidate is now out! 📣 The new native rewrite is almost here. Try it out on your codebases, and make sure your team is ready for the upcoming 7.0 release!

What's new in the RC since the beta? A couple of things, but worth calling out are - A rebuilt `--watch` mode - Stability improvements across the board - New ported editor features - Strategies for using less memory in editors

The rebuilt `--watch` mode is powered by a Go port of Parcel's watcher, giving TypeScript 7 efficient, stable cross-platform file watching. Expect much less CPU usage on idle.

Editor support has come a long way since we first debuted: auto-imports, expandable hovers, inlay hints, code lenses, JSX linked editing, semantic highlighting, sort imports, remove unused imports, and more are now available.

Not yet mentioned in the blog post: TypeScript 7.0 will release unused type-checkers in the editor after enough idle time. For bigger projects, this should help reduce memory usage after peaking.

Speaking of which: TypeScript 7 also brings more parallelism to builds. ℹ️ Some tips ℹ️ `--checkers` controls the number of type-checking workers, while `--builders` controls parallel project-reference builds. Use more on powerful machines, or scale down to fewer to control memory usage.

For teams moving gradually, `tsc` from TypeScript 7 can run side-by-side with the `tsc6` executable & API from TypeScript 6 using the new `@typescript/typescript6` package.