Video · 2026-07-13 · 1h 15m · 6 moments

Bun re-written in Rust, Zig team big mad ⟡ TypeScript 7 released, now 10x faster! ⌁ Syntax Weekly ⌁

✦ AI generated

timeline · colored by role

Data◆

The native Go port of the TypeScript compiler makes builds roughly 10 times faster, cutting VS Code's own build time from 125 seconds to about 10-15 seconds.

CJ explains that TypeScript 7's native Go-ported compiler delivers roughly 10x faster builds, citing VS Code's build time dropping from 125 seconds to about 10 seconds and Sentry's from 140 to 15 seconds.

transcript

CJ Reynolds: So VS Code is a massive TypeScript codebase. And with TypeScript 6 before the native port, it used to take 125 seconds to build that whole codebase. Now it only takes 10 seconds with TypeScript 6.

extends · 2

Example◆

Jared Sumner rewrote Bun's entire codebase from Zig to Rust by running 64 parallel Claude (Fable pre-release) instances across four work trees, porting and validating files against the existing test suite.

Scott describes Jared Sumner's blog post detailing how he used 64 simultaneous Claude instances across four work trees to port Bun from Zig to Rust, an approach that cost well over $100,000 in tokens but reportedly saved a team-year of work.

transcript

Scott Tolinski: In the post he talks about how he used basically parallel clouds to rewrite this the zig codebase in rust and uh this visual shows he basically had four work trees and 64 instances of claude using fable like the pre-release version all rewriting the basically porting the files from zig to rust checking make to make sure the test pass.

supports · 1

Claim◆

Andrew Kelly's rebuttal blog post about the Bun/Zig rewrite is undermined because its personal attacks and pompous tone overshadow its legitimate technical points.

Scott argues that Zig creator Andrew Kelly's response to the Bun rewrite, despite containing valid criticisms, is overshadowed by personal attacks and a condescending tone that made readers focus on the drama rather than the substance.

transcript

Scott Tolinski: This blog post is the prime example of letting your emotions ruin every good point you could possibly have because the conversation around this blog post was not about the important things. The conversation around this blog post was around the personal attacks and nature of this post.

Anecdote

GPT 5.6 Soul one-shotted a complex CRT/VHS video shader with full control over scan lines, line pitching, bloom, vignetting, and ghosting, a result Scott doesn't believe other models could have achieved.

Scott shares a first impression of GPT 5.6 Soul, saying it one-shotted a detailed CRT/VHS-style video shader with all the effects he wanted, a level of quality he hadn't seen from other models on this project.

transcript

Scott Tolinski: I put it on a task of um building out some VHS and some CRT style shaders for me. And I had an implementation that I wanted... it oneshotted this CRT shader that looks really stinking good. Um, and it has all of the things that I want, whether that is control over the scan lines or line pitching, bloom, vignetting.

rebuts · 1

Claim

Vercel's acquisition of Better Auth lets the project drop its monetization strategy entirely and refocus purely on being the best open-source JavaScript auth package.

CJ explains that after being acquired by Vercel, the Better Auth team no longer needs to build a paid product around the library and can instead focus full-time on open-source development.

transcript

CJ Reynolds: The transition lets us refocus on Better Off's original mission without having to shape the strategy around monetization. So they don't have to think about how do they create a paid product, how do they scale that? They can just focus on making the best open-source JavaScript off package that they can.

Fact◆

Grok build CLI was silently uploading entire private Git repositories (including unredacted secrets) to a Google Cloud bucket, transferring far more data than the coding task required.

Scott relays a security report showing Grok's build CLI was uploading whole private codebases—secrets included—to a Google Cloud bucket, with a 12GB test repo sending 5.1GB despite the task needing only 192KB, and no opt-in was ever required.

transcript

Scott Tolinski: Grock build CLI was uploading entire Git repositories to a Google Cloud bucket. Private code bases, unredacted secrets included... On a 12 gigabyte test repo, 5.1 GB flew out the door to XAI's GR code session traces bucket while the actual coding task just needed 192 kilobytes.

extends · 1

Highlight slides

Native Go Port Makes TypeScript ~10x Faster✦ from: The native Go port of the TypeScript compiler makes builds roughly 10 times faster, cutting VS Code's own build time from 125 seconds to about 10-15 seconds.Build Times: Before vs After Native Port✦ from: The native Go port of the TypeScript compiler makes builds roughly 10 times faster, cutting VS Code's own build time from 125 seconds to about 10-15 seconds.Porting Bun from Zig to Rust with Claude✦ from: Jared Sumner rewrote Bun's entire codebase from Zig to Rust by running 64 parallel Claude (Fable pre-release) instances across four work trees, porting and validating files against the existing test suite.Scale and Payoff✦ from: Jared Sumner rewrote Bun's entire codebase from Zig to Rust by running 64 parallel Claude (Fable pre-release) instances across four work trees, porting and validating files against the existing test suite.Cost vs. Payoff✦ from: Jared Sumner rewrote Bun's entire codebase from Zig to Rust by running 64 parallel Claude (Fable pre-release) instances across four work trees, porting and validating files against the existing test suite.Rebuttal's Substance Lost to Tone✦ from: Andrew Kelly's rebuttal blog post about the Bun/Zig rewrite is undermined because its personal attacks and pompous tone overshadow its legitimate technical points.Scott's Takeaway✦ from: Andrew Kelly's rebuttal blog post about the Bun/Zig rewrite is undermined because its personal attacks and pompous tone overshadow its legitimate technical points.Grok CLI Silently Exfiltrated Private Repos✦ from: Grok build CLI was silently uploading entire private Git repositories (including unredacted secrets) to a Google Cloud bucket, transferring far more data than the coding task required.Wildly Excessive Data Transfer✦ from: Grok build CLI was silently uploading entire private Git repositories (including unredacted secrets) to a Google Cloud bucket, transferring far more data than the coding task required.

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