Post

Slack Engineering

@slack.engineering

Slack now runs the new Go-powered @typescriptlang.org checker in CI. Using the tool saves us over 5 minutes per run, meaning faster merges and happier developers. Huge thanks to Anders, @jakebailey.dev, and everyone else on the project for the incredible performance gains.

Microsoft Developer@developer.microsoft.com

ICYMI: TypeScript is now 10x faster!

19/6/25, 5:51 pm19 reposts142 likes

@valorz.bsky.social

more details?

@kamranicus.com

a blog post on this would be great ➕

We’ll probably put something together when we’ve fully switched over — still some language server work to do before we completely deprecate tsc

What was the original typecheck time?

Time varies based on how many node modules need updating, but just running tsc used to take over 6 minutes, and tsgo takes ~42 seconds, give or take