regex 1.13 now has a `regex!` macro (NOT compile time regex) that encapsulates the common pattern of using something like `std::sync::LazyLock` to ensure it only compiles ~once. github.com/rust-lang/re...

I'd like to add a simple macro to `regex` for building a regex once and then using it via `LazyLock` (or similar). But I'm having trouble with the name. Should it be `regex::regex!(..)` or `regex::re!(..)` or something else? See pictures for before and after.

Jiff has been added to blessed.rs!

Plausibly low hanging fruit for improving substring search performance in Rust's standard library! github.com/rust-lang/ru...

Improving Miri is so critical. Thank you Tiffany!

Thanks for all the kinds words from old fellow Lobsters users. :-)

I was recently diagnosed with a rare autoimmune disorder called anti-NMDA receptor encephalitis. It's a "disease of chaos" that completely upturned my life for a couple months. I wrote a blog about it that goes into more detail and discusses prognosis. :-) burntsushi.net/encephalitis/

My new NAS build. My previous NAS was in continuous operation for about 10 years. It served me well, but it was time for an upgrade. pcpartpicker.com/user/burntsu...

wow

Shoutout to the `lexopt` crate as a great example of a Rust library that is effectively done. It's only had 6 releases in its 5 years of life. It's basically perfect if your needs match its level of abstraction. github.com/blyxxyz/lexopt

I love to see it! I'm curious if they will write the regex engine in Rust too. :-) github.com/uutils/grep

My son Murphy getting a successful POST on his first attempt. He doesn't know how good he has it. youtu.be/-HBOBskFMVg?...

The number of times in the past few weeks that I've said out loud to my wife, "I was talking to Chat about yadda yadda yadda" (Chat is short for ChatGPT) in the past few weeks is quite remarkable. I'm just waiting for the first time she says it. That will be a major milestone unlocked.

This is good.

I've added an AI policy to ripgrep that was shamelessly copied from uv's policy. I plan to add this to the rest of my projects, but if anyone wants to offer feedback on wording, now would be a good time! github.com/BurntSushi/r...

Why don't Jiff's strftime and strptime routines validate the format string separately from formatting or parsing a datetime? github.com/BurntSushi/j...

What it means that Ubuntu is using Rust, new blog post with some thoughts spurred by Jon Seager's excellent keynote at @rustnationuk.bsky.social (smallcultfollowing.com/babysteps/bl...)

Finally got around to migrating off of CoC to the native neovim LSP client. And while I was at it, I ported my entire vim config over to Lua. It was quite a bit more work that I thought it would be! It's been over a decade since I've written Lua, but it's a dream come true compared to Vimscript.

uutils has now fully migrated off of Chrono (which is now soft-deprecated) to Jiff! github.com/uutils/coreu...

Trumpism is Fascism github.com/BurntSushi/n...

Alex Pretti’s last words were “are you ok?” said the woman next to him who ICE also pepper sprayed in the face.

“Floating-Point Printing and Parsing Can Be Simple And Fast” The fastest known floating-point printer and parsing algorithms - fixed-width printing, shortest-width printing, and parsing, all in 400 lines of Go. research.swtch.com/fp research.swtch.com/fp-proof

Using the `regex` crate inside the Linux kernel www.dawidmacek.com/posts/2025/r...

I've updated the rebar benchmarks, and .NET's regex engine in v10 is right about on par with Rust's regex crate! Nice work! (rebar is, I believe, the most comprehensive public regex benchmark in existence.) github.com/BurntSushi/r...

First time seeing this and it is really great! abseil.io/fast/hints.h...

so pumped for the ty beta to finally be here, we did so much great work it rules! astral.sh/blog/ty

** Speaker announcement ** Our next speaker is Andrew "BurntSushi" Gallant! Andrew is a member of the Rust project and maintains many important crates. Info & tickets: 2026.rustweek.org Do you also want to give a talk? Our CFP is open. See you in Utrecht in May! #rustlang #rustweek2026

🦀 I've improved the implementation behind all the string formatting macros in Rust: println, panic, format, write, log::info, etc. (Everything using format_args!().) They will compile a bit faster, use a bit less memory while compiling, result in smaller binaries, and produce more efficient code! 🎉

Jaw droppingly wild. www.youtube.com/watch?v=NPtK...

ripgrep 15 is out! Mostly a host of bug fixes, particularly around gitignore. Some minor perf improvements. A couple small features. And (partial) Jujutsu support for gitignore. github.com/BurntSushi/r...

The crates.​io team was notified of two malicious crates (with similar names as legitimate crates) which were actively searching file contents for Etherum private keys, Solana private keys, and arbitrary byte arrays for exfiltration. See the blog post for details: blog.rust-lang.org/2025/09/24/c...

Happy 10 year anniversary to this tweet! Has memory safety in C++ been solved yet? x.com/CppCon/statu...

Found what appears to be my oldest game save on a physical memory card. From about 18 years ago! This is from The Simpsons: Hit and Run. On a GameCube memory card. I do probably have some N64 memory cards lying around... Hmmm.

We received reports of a phishing campaign targeting crates​.io users. Do not click on links asking to authenticate to protect your account. More information: blog.rust-lang.org/2025/09/12/c...

FYI, I got an obvious phishing attempt in my inbox from `[email protected]` that was masquerading as a security breach notification. It made it past gmail's spam filters. The link goes to the `github.rustfoundation.dev` domain.

Today, we're announcing our first hosted infrastructure product: pyx, a Python-native package registry. We think of pyx as an optimized backend for uv: it’s a package registry, but it also solves problems that go beyond the scope of a traditional "package registry".

Plato, Aug 2010 - July 7, 2025. You never did quite learn how to poop like a normal cat, but I loved you anyway. I'll miss you buddy.

Howdy all. I'm unfortunately not going to be with my employer for much longer due to team relocation. If anyone has any info on roles that would allow me to continue my Rust compiler work (in New York City), they'd be greatly appreciated.

The uv build backend is now stable, and considered ready for production use. An alternative to setuptools, hatchling, etc. for pure Python projects, with a focus on good defaults, user-friendly error messages, and performance. When used with uv, it's 10-35x faster.

spent some time switching #jj-vcs over to @burntsushi.net’s Jiff for datetime handling. look at how much simpler (most) of the code is! github.com/jj-vcs/jj/pu... there are some things i want to improve down the line, like adding reference support to interim so we can pass around an &Zoned, but…

Surprise surprise. Hugo has yet again started failing to build my web site with an unactionable error message. Happens about once per year. I don't stay aprised of Hugo development. I just want it to work. This has gotta be at least one of the reasons why people build their SSG.

Today, we’re announcing the preview release of ty, an extremely fast type checker and language server for Python, written in Rust. In early testing, it's 10x, 50x, even 100x faster than existing type checkers. (We've seen >600x speed-ups over Mypy in some real-world projects.)

Biff is command line tool for datetime arithmetic, parsing, formatting, rounding and more. It's built on top of Jiff, which means it is DST aware and has tight integration with time zones. github.com/BurntSushi/b...

"All in all, I think the documentation [of Jiff] very comprehensive, pretty discoverable, super approachable, and explains its philosophy pretty well. It has lots of explanations and simple how-to guides, and a comprehensive reference." www.harudagondi.space/blog/rust-do...

I marked `xsv` as being officially unmaintained and archived the repository: github.com/BurntSushi/xsv It had been de facto unmaintained for some time and some excellent tools have popped up in its place. So it's time to pass the torch!

I am planning to release Jiff 1.0, a datetime library for Rust, this summer. After that, I do not plan to make breaking changes, possibly indefinitely. I would LOVE LOVE LOVE more experience reports before stabilizing Jiff. Tell your friends. github.com/BurntSushi/j...

Murph (4.5yo son) had his first lesson in historiography yesterday. I was listing off a bunch of random facts about George Washington, and Murph asked where he was. I said he died a long time ago. Then Murph (roughly) asks, "but then how do you know all that about him?"

woops /r/rust posted about facet like... one day too early x) I updated the READMEs with some practical examples, hopefully it shows the value better: github.com/facet-rs/fac...

🦀 Hello World! The Rust project now has an official presence on Bluesky! ✨ We'll be posting the same on our Mastodon and Bluesky accounts, so you won't miss anything on either platform.