TypeScript 7 goes native Go, 10x faster
TypeScript 7 shipped with a native Go port of the compiler, delivering sub-second build times that the community immediately stress-tested by running Doom on it. The comment thread was unusually enthusiastic for a language release, with developers noting the team had maintained two separate codebases during the transition and calling it one of the more impressive engineering feats in the JS/TS ecosystem.
The speed improvement is not marginal. Comments cited 'sub-1-day-first-frame-of-DOOM' as a benchmark, which is absurd in the best way. For large monorepos and CI pipelines that currently spend meaningful time on TypeScript compilation, this is a concrete infrastructure win with no migration cost.
The release also signals that the 'rewrite in a faster language' trend is hitting developer tooling at the core layer. Bun went from Node to Zig to Rust (per the parallel thread). TypeScript went from JavaScript to Go. The JS/TS toolchain is being rebuilt from scratch underneath the developer, while the API surface stays the same.
So what?
If your CI pipeline is TypeScript-heavy, upgrading to TS7 is likely one of the highest-leverage infrastructure changes you can make this quarter with zero code changes. More broadly, the toolchain generation shift is accelerating: tools that were slow by default are becoming fast by default, which changes the economics of how often you can run builds and checks.