Jake Bailey

Jake Bailey

@jakebailey.dev

Principal Software Engineer at Microsoft working on TypeScript

4.4K followers400 following2K posts

Jake Bailey reposted

Daniel Rosenwasser
@danr.bsky.social

Some speed & memory improvements you'll see with TypeScript 7.1 Beta. We're hoping to land more before RC & stable.

TypeScript@typescriptlang.org

TypeScript 7.1 Beta is now available! Now with a preview API, content mapper support, new features, and some great optimizations. Give it a try and give us some feedback!

devblogs.microsoft.comAnnouncing TypeScript 7.1 Beta - TypeScriptAnnouncing TypeScript 7.1 Beta, bringing a preview API and new features, all while being faster and leaner than TypeScript 7.0.
Jake Bailey
@jakebailey.dev

that scene from the matrix except it's me reading articles, talk slides, PR descriptions, saying "that's Claude", "that's GPT", "that's Claude", "Claude", "GPT", ...

Jake Bailey reposted

Savannah Ostrowski
@savannah.dev

my husband just interrupted putting dishes away because he wanted to show me something called a “jj megamerge”. i’m scared i’m losing my husband to jj.

Jake Bailey reposted

NullVoxPopuli
@nullvoxpopuli.com

I'm declaring TypeScript 7 for Ember: ready At work, on the 3 million line monolithic package, I'm seeing ~ 4m40s -> 12s a ✨ 23x ✨ speed boost

Jake Bailey
@jakebailey.dev

This is now merged!!! 🎉

Jake Bailey@jakebailey.dev

This is a fun one: I just sent go.dev/cl/790740, which elides method wrappers for embedded types at offset zero, common for mixins/inherited data types. Doing this removes 60 _thousand_ method wrappers from tsgo's AST package, dropping the compilation of our main exe from 49s to 28s on my machine.

Jake Bailey reposted

Orta Therox
@orta.io

I've bumped all of the @typescriptlang.org compiler usage in @puzzmo.com to now use TS7 and the new compiler API. All looks very reasonable and has every feature I needed for codegen and AST introspection Literally no notes :+1:

Jake Bailey reposted

Andrew Branch
@andrewbran.ch

If you’re not stalking TypeScript PRs, you might be surprised how much you can do with the API in nightlies (and even in 7.0 stable), so here’s a tiny demo that I think hits some of the highlights. 🧵

Jake Bailey
@jakebailey.dev

with the way GitHub issues are going these days, I think I now understand what it was like when Google Duplex came out and businesses were talking to bots on the phone

Jake Bailey
@jakebailey.dev

it's so great knowing that so many resources out there are being spent on *checks notes* protecting me from yaml files that are a little too complicated

Jake Bailey
@jakebailey.dev

the worst part about talks is writing talks the best part about writing talks is finding all the oopsies in the code being talked about and thus, I now have PRs to make the TS AST 2% smaller, the parser 10% faster, the binder 1.5% faster

Jake Bailey reposted

Artem Zakharchenko
@kettanaito.com

TypeScript 7.0 is incredible. I didn't even know type checking/generation took that much time in my build. Now it's 3-4x faster. Highly recommend updating.

Jake Bailey
@jakebailey.dev

i apologize to the Go team for my 17 open CLs i also apologize because unfortunately i expect that number to only grow (there is however one way to fix that problem 🤪)

Jake Bailey
@jakebailey.dev

Soo I hit the button to release TS 7 then swiftly went out of office for vacation 😅 How's it going for everyone? Hopefully speedy speedy good

Jake Bailey reposted

npm
@npmjs.com

npm v12 is now generally available. npm install now makes install scripts, Git, and remote-URL dependencies opt-in by default. We're also retiring npm 2FA-bypass GAT: no account management (early Aug 2026), no direct publishing (~Jan 2027). More info at github.blog/changelog/20...

github.blognpm install-time security and GAT bypass2fa deprecation - GitHub Changelognpm v12 is now generally available and tagged latest. This major release turns on the install-time security defaults we announced in June, and it’s also where we begin a deprecation…
Jake Bailey
@jakebailey.dev

Really excited that this is out the door! Super proud of the work the team has done in the past year to get this complete. Excited for the future; API stuff is in full swing, more perf improvements, and more. Please give it a try!!!

TypeScript@typescriptlang.org

📣 The moment is here. 📣 TypeScript 7 is officially released! 7️⃣ devblogs.microsoft.com/typescript/a...

devblogs.microsoft.comAnnouncing TypeScript 7.0 - TypeScriptToday we are proud to announce the availability of TypeScript 7, a 10x faster native port of TypeScript! Since its early days, TypeScript has promised to
Jake Bailey
@jakebailey.dev

Pretty surprised to see movement in the "make regex backtracking not catastrophic" space: arxiv.org/pdf/2311.17620 Only learned about this by being cross referenced to github.com/le0pard/re2js on a Go CL fixing a regex bug

github.comGitHub - le0pard/re2js: RE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matchingRE2JS is the JavaScript port of RE2, a regular expression engine that provides linear time matching - le0pard/re2js

Jake Bailey reposted

[Spooky Name Placeholder]
@mxlabradorite.bsky.social

This interview in Vanity Fair came out in 2010, and this exchange from it has lived rent-free in my head ever since.

Joshua Rivera@jmrivera.bsky.social

wrote about jackass for those confused by how jackass became kind of important to a lot of people aftermath.site/jackass-movi...

aftermath.siteSomehow, Jackass Really Was That Big A DealHow Jackass transformed from idiotic nuisance to one of the most endearing symbols of male friendship in pop culture
Jake Bailey
@jakebailey.dev

A week on and it's still working well; it required a gopls change (go.dev/cl/795221, hope that's released soon!). With 5 day pruning like Go does itself, that 5 day window leaves me sitting at about 150GB of cache, which comes out to about 20GB on disk. Very good!

Jake Bailey@jakebailey.dev

Did a bit of hacking this weekend and cooked up "gocachez", a GOCACHEPROG which transparently compresses the Go build cache to save disk space at rest at the cost of CPU, with fairly good results. Building and testing TS would normally eat up roughly 4GB, but with gocachez it's only about 400MB.