Jarred

7 ms·

1.
by Jarred 2mo ago
It spawns ephemeral EC2/Azure instances, which is a lot cheaper than the GitHub actions runners we used before that. We shard to a lot of machines for tests and I’d be worried about running out if we used dedicated servers. BuildKite i
2.
by Jarred 2mo ago
CI has always been expensive for Bun including before the acquisition. We build for [macOS, Linux, FreeBSD, Android, Windows] x [ARM64, x64] and then run tests on multiple Linux distros with multiple shards, multiple macOS versions and Wind
3.
by Jarred 2mo ago
Claude Code is a large codebase and uses tons of Node’s features either directly or indirectly through dependencies. fetch(), node:http, node:tls, node:os, node:net, node:fs, AbortSignal, node:child_process, node:tty, node:process, node:htt
4.
by Jarred 2mo ago
Does it print a bun.report link and can you paste it? I will investigate.
5.
by Jarred 2mo ago
Bun’s Rust rewrite shipped in Claude Code over a month ago and barely anyone noticed. Claude Code is widely used. The Rust rewrite is going well overall. In the Bun v1.4 video, I promised a certain number of newly passing Node.js tests were
6.
by Jarred 2mo ago
Grouped and arena allocations work really well in Zig. For awhile, we tried to use this pattern almost everywhere in Bun but it gets really tricky when there’s some GC-managed memory and you want to free things incrementally to reduce RSS.
7.
by Jarred 2mo ago
I have learned so much reading Andrew’s code and as I said in the original post: Bun would never have happened without Zig. > The post claims they were fuzzing their Zig code, while during our calls the whole Bun team told us that they
8.
by Jarred 3mo ago
> new codebase doesn’t have any Claude Code & Prisma use it as of last week.
9.
by Jarred 3mo ago
I’m the author of this PR. This PR is an implementation of the design from https://webkit.org/blog/7846/concurrent-javascript-it-can-wo... . I think it would be really cool if JavaScript had true shared object mult
10.
by Jarred 4mo ago
Dynamic workflows, in my experience, make Claude more effective at complex long-running tasks. They help precisely with getting Claude to do the task correctly. It feels more like a bespoke build system for the specific task/project th
11.
by Jarred 4mo ago
> the Rust, Anthropic-focused rewrite Nope. That's 100% me.
12.
by Jarred 4mo ago
`PathString` worked the exact same way in our Zig code, with less visibility from the compiler & type system. And yes, it will be refactored heavily (or deleted overall) in the next week or so.
13.
by Jarred 4mo ago
almost
14.
by Jarred 4mo ago
> mostly a JavaScript interpreter wrapper Not accurate. Bun is a batteries-included JavaScript & CSS transpiler (parser), minifier, bundler, npm-like package manager, Jest-like test runner, as well as runtime APIs like a builtin Post
15.
by Jarred 4mo ago
That was me - not CI marking as slop. It kept around 60 .zig files around that should’ve been moved to .rs files.
16.
by Jarred 4mo ago
> it's basically solving the ,,tests not pass'' problem by changing the tests themselves. False. 0 test files were deleted. 0 pre-existing tests were skipped, todo’d, or had assertions removed. 5 new tests were added in te
17.
by Jarred 4mo ago
Still writing the blog post about this. Will share more details. For where this is coming from, skim the bugfixes in the Bun v1.3.14 and earlier release notes. Rust won’t catch all of these - leaks from holding references too long and anyth
18.
by Jarred 4mo ago
Bun’s patched Zig is on Zig 0.15.1
19.
by Jarred 4mo ago
cargo check reported over 16,000 compiler errors when I wrote that message. It could not print a version number or run JavaScript. I didn’t expect it to work this quickly and I also didn’t expect the performance to be as competitive. There’
20.
by Jarred 5mo ago
I work on Bun and this is my branch This whole thread is an overreaction. 302 comments about code that does not work. We haven’t committed to rewriting. There’s a very high chance all this code gets thrown out completely. I’m curious to see
21.
by Jarred 5mo ago
I work on Bun, and this post is confusing to me. Me personally and the Bun team continues to dogfood & make Bun better everyday. Our development pace has only gotten faster. Bun's stability has improved significantly since joining
22.
by Jarred 5mo ago
From Amol, who is the Head of Growth: > For clarity, we're running a small test on ~2% of new prosumer signups. Existing Pro and Max subscribers aren't affected. https://x.com/TheAmolAvasare/status/204
23.
by Jarred 5mo ago
> turns out for me, bun is not production ready What issue did you run into?
24.
by Jarred 6mo ago
I spent some time investigating this, and the issue is not accurate - Claude Code itself does not have code that spawns `git reset --hard origin/main` Most likely, the developer ran `/loop 10m <prompt>` or asked claude to cr
25.
by Jarred 7mo ago
You can find a comparison with `bun build` on Bun's homepage. It hasn't been updated in a little while, but I haven't heard that the relative difference between Bun and Rolldown has changed much in the time since (both have g
26.
by Jarred 10mo ago
I have a PR that’s been sitting for awhile that exposes the extra options from the renameat2 and renameatx_np syscalls which is a good way to implement self-updaters that work even when multiple processes are updating the same path on disk
27.
by Jarred 10mo ago
The reference docs are auto generated from node’s TypeScript types. node:vm is better than using the same global object to run untrusted code, but it’s not really a sandbox
28.
by Jarred 10mo ago
Probably not. When we add new APIs in Bun, we generally base the interface off of popular existing packages. The bar is very high for a runtime to include libraries because the expectation is to support those APIs ~forever. And I can’t thin
29.
by Jarred 10mo ago
I work on Bun. Happy to answer any questions
30.
by Jarred 10mo ago
> undermine your confidence in Zig Nah I do think the combo of not using Twitter, not using Discord, and not using GitHub does make it a bit more challenging for Zig to become a mainstream programming language. Twitter being the least im

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