Andrew Gallant
@burntsushi5
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I love to code. I rarely check DMs. My email address is on my web site.
Marlborough, MA
Joined October 2016
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Pinned Tweet
I've finally decided to join GitHub Sponsors. Any contribution would be most welcome, even if it is just a one-time "thanks" for past work. :-)
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@rust_foundation
"The Project would like the word Rust in a crate name to imply ownership by the Project."
Who decided that? I've been a project member for years, and this is the first I've heard of it.
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Jiff is a new datetime library for Rust!
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I updated the firmware on my Brother laser printer the other day. Apparently it came with an awesome new feature called "toner DRM." My aftermarket toner no longer works. So I had to buy "genuine" toner. And ooo boy is it more expensive.
Lesson learned: never update firmware.
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regex 1.8.0 is out! A big release, but a precursor to an even bigger one.
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"There are approximately 1.5 million total lines of Rust code in AOSP ... To date, there have been zero memory safety vulnerabilities discovered in Android’s Rust code."
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"Using unwrap() in Rust is Okay"
First blog post in over two years. Finally.
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I'm excited to share that I've left Salesforce and joined
@astral_sh
! I don't start until November, but I can't wait to get started improving Python tooling with Rust!
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After an almost 3 year struggle with infertility, I'm happy to announce that my wife is 21 weeks pregnant! :D
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ripgrep 14 is out! hyperlink support! regex engine rewrite!
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I've spent the last 3 years or so working on a rewrite of the regex crate. Much of that time has gone into publishing the crate internals as its own separately versioned library. I wrote about the final result here:
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ripgrep 13 is out! Lots of bug fixes, perf improvements and a fix for CVE-2021-3013. -. is now an alias for --hidden, and Windows binaries are now fully static executables.
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Why is Rust's standard library substring search so much slower than what memchr provides? This is asked a lot, so I finally attempted to write a complete answer to this in memchr's README.
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After our resignation a few weeks ago, I'm so relieved to see the Core team and the team leads working together on a path forward. This has all been incredibly stressful for all involved, but our call for action has not been ignored.
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Writing docs in Rust has become immensely more pleasant now that I can do [`memmem::find`] instead of [`memmem::find`](memmem/fn.find.html). Massive quality of life improvement!
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Apologies for burying it in a reddit thread, but I wrote about my perspective on moderation:
(Please DON'T downvote the parent comment.)
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The former Rust mod team has retracted the part of our resignation statement that urged folks to be skeptical of Core. We apologize for any harm that this statement caused. It was poor judgment on our part.
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fun fact: a Regex was ~500 bytes on the stack prior to 1.4.4. In 1.4.4, some internal changes made it ~800 bytes. This caused stack overflows in some environments that used lots of regex! Now, in 1.4.5, a Regex is 16 bytes. See:
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regex 1.0 is out!
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Hopefully coming to a Rust near you soon: fearless transmutes.
Really has the potential to make a lot of unsafe Rust much safer, and also make transmutes in general more accessible and easier to be confident in their correctness. Game changer IMO.
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This makes me want guaranteed tail calls in Rust.
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Benchmarks are hard. I wrote a response (with moar benchmarks) here:
I've benchmarked one of most popular
#Rust
libraries `memchr` (200M downloads) against `stringzilla` 🦖
Won 7 benchmarks out 8. I was hoping for a clear win, but apparently I still have things to optimize on Arm 💪
The benchmarks are very easy to repeat:
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It turns out that samply is the answer! Big shout out. Really nice user experience (particularly via the Firefox profiler UI). I might even start using it on Linux in lieu of `perf report`.
How do folks do CPU profiling on macOS? Specifically, I'm looking for something like `perf annotate` on Linux, where one can see the specific instructions that are taking up the most time.
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I'm looking forward to the next phase of Rust leadership!
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Rust is now a supported regex flavor on !
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ripgrep 0.8.0 is out! Featuring configuration files, compressed file search and true colors!
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You know you've really made it when your tool gets its own cheat sheet. 🙃
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libripgrep is beginning to produce fruits. multi line search is coming!
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This PR adds several features to the `regex` crate that let you trim the fat. In my experiments, binary size overhead drops from 1.3M to 332K, compile times decrease by about 2x and the entire dependency tree shrinks to a single crate (regex-syntax).
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ripgrep 14.1.0 is out! It comes with an unbounded memory growth bug fix, some improvements to fish shell completions and release binaries for more ARM targets.
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ripgrep 0.10.0 is out! It comes with PCRE2 support (-P), multi-line searching (-U), JSON output (--json) and even a work-around for CRLF support on Windows (--crlf). Along with lots of bug fixes!
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@lzsthw
The root of this issue is this long standing Windows-only request:
Thanks for giving ripgrep a try. Now that you're a former user, I'll certainly enjoy you not shitting on my work now.
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Shipped my first feature at Astral!
Ruff v0.1.8 is out now, and includes support for formatting Python doctests + Python snippets in docstrings (Markdown and reStructuredText), Thanks to
@burntsushi5
.
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Framework 13, meet Framework 16.
Archlinux works perfectly on the 16 out of the box. w00t.
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I thought I was being trolled at first, but the Antarctica/Troll IANA time zone has a DST transition that moves the clocks forward *2* hours. That means days in Troll can be 22, 24 or 26 hours long!
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It took me hours to figure out that `man groff_man_style` is probably what one wants to read if one wants to learn how to write a man page on Linux.
Hours.
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The quickcheck crate was the first Rust code I ever wrote, and it is now finally 1.0!
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SIMD available in Rust nightly!
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ripgrep 11 is out! Featuring lots of bug fixes, better binary filtering UX and a hybrid regex engine mode!
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ripgrep 12 is out!
I'd also love to get feedback on a (hopefully soon) upcoming feature that will add indexing support to ripgrep:
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They also cited an ReDoS bug in the regex crate, yet C++'s standard regex engine uses backtracking and is susceptible to exponential blowup.
@OtaK_
Fun fact: the most recent CVE in the Rust standard library (remove_dir_all) also applies to C++ standard library implementations. But in C++ it's just considered undefined behaviour and your own fault if any other process touches the file system, so it's not considered an issue.
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Made it to 4 years.
Had a brief scare just a couple days ago with a power outage, but the UPS and generator pulled through and kept the streak alive.
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Gentle reminder that the regex crate repo has Discussions enabled, and I'm happy to field all manner of questions. Everything from general wonderingments to help with Advent of Code programs. :-)
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memchr 2.6 for Rust just got a lot faster on Apple silicon. It now has SIMD neon implementations of memchr and memmem. Plus a lot of other goodies.
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Introducing "byte strings" to Rust: a string type that is not required to be valid UTF-8.
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Cauchy, Aug 2010 - Sept 30, 2023. I love you buddy. I'll miss you.
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First time using 'let ... else' Rust syntax in a short little program. I love it. It is the bomb dot com.
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I've just released aho-corasick 1.1.0, which comes with a SIMD implementation of Teddy on aarch64. That means searches for a small number of patterns are likely to get a lot faster. This trickles up to the regex engine and into tools like ripgrep:
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I translated a simple C program implementing the Thompson NFA simulation to a few different Rust programs. I shared a few thoughts about it too.
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The fzf docs have a really nice guide for integrating it with ripgrep and bat. The result is quite impressive.
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In Rust, why does substring search return byte offsets instead of codepoint offsets? Answer:
The really interesting bit of this question is that it's motivated by a valid use case for using codepoint offsets in the first place! A rare sight indeed.
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I am attempting Advent of Code this year for the first time and posting my solutions in Rust. I welcome beginner questions on the issue tracker!
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I should have done this with the initial release, but if you've tried to use Jiff and are willing to share your experience, I'd love to have it! I've created a new Discussions category for it.
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ripgrep will be available in Ubuntu 18.10 (Cosmic)
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Friendly reminder that if you have a question about the `regex` crate, then I welcome any and all questions. Just open a new Discussion post!
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ripgrep 12.1.0 is out! Mostly just bug fixes. Don't forget to drop by ripgrep's Discussion board on GitHub if you have questions!
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I'm way behind the eight-ball on this one, but
@mitsuhiko
's `insta` Rust library for snapshot testing is amazing. It's a game changer. I was introduced to it at
@astral_sh
, and now I'm starting to use it in my own projects.
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I just upgraded my laptop for the first time in ~8 years. I went from a ThinkPad T430 to a System76 Darter Pro. I wrote up my thoughts on the laptop and my experience installing Archlinux on it:
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Fuck, Rust is awesome. Been waiting literally years to write this PR:
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Good gravy. Where has `git absorb` been all my life? Has made a FANTASTIC improvement to my workflow.
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I like the nudge to read more LLVM IR. I spend a lot of time switching between Rust and Assembly, but perhaps adding LLVM IR into that process will demystify some things.
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anyhow is brilliant. I've started using it in all my CLI programs and internal libraries for which structured errors aren't important. It's really lovely and pleasant to use. It's the first error helper library I've used more than once.
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Truly a thing of beauty.
Now if only my email inbox could be the same as ripgrep's PR queue. A fool can dream.
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regex 1.9.5 should mostly fix a long-standing performance problem when sharing a regex across multiple threads. Please report any time or significant memory usage regressions!
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Got to 3 years of uptime on my mac mini in my home office.
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A quick take on why I think Rust is good for working with strings.
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Jiff is now ready for the web! WASM support has been added in 0.1.3:
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Helix 24.03 is shipping with a streaming regex implementation based on regex-automata. w00t!
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Well, it only took 3 days, but as a result of the insurrection, a crazy family member has been cut out of my life. Nuts, but a good thing overall.
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@pcwalton
I had an electrician say "I don't know, I'll have to consult the code book" to a question I had. He then said, "but don't tell my boss, he doesn't like it when I say 'I don't know.'"
Presumably because too many people see "I don't know" as a weakness.
But it's really a strength
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Around ten years ago, I switched to Google Chrome from Firefox when it was released. I've gotten tired of Chrome's slowness, so I've been experimenting with Firefox again over the last couple weeks and have made the full switch over!
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People using time to compile ripgrep as their CPU benchmark. Now I know how Google feels when people use them to test their Internet connection. Hehe.
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I hope to be releasing aho-corasick 1.0 soon, and before I do, I would love feedback on the API!
Even if you have no idea what the heck this funny sounding "Aho-Corasick" thing is, I still would love to hear from you.
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rewrite of memchr crate with SIMD awesomeness
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I was today years old when I learned that `git rebase --update-refs` makes it just about painless to automatically update dependency branches. I had been trying various `git rebase --onto dependency dependency@{10}` machinations to try to get it right before. What a life changer.
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What kinds of things do you want from a Rust datetime library that you've found difficult or impossible to get from the crates that exist today?
Also, happy leap year!
#rustlang
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A new low level regex library for working with DFAs directly, including support for deserializing DFAs and using them in no_std environments:
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ripgrep 0.7.0 is out!
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How do folks do CPU profiling on macOS? Specifically, I'm looking for something like `perf annotate` on Linux, where one can see the specific instructions that are taking up the most time.
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I just spent the last two evenings converting from vim to neovim. Most of the work was just going through every line of my vim config and cleaning things up. But I also dug into getting LSP w/ rust-analyzer working right. Here's my final recipe:
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I just updated the memchr crate to include my new ultra-fast implementation of memmem! It's now part of regex 1.5.
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Benchmarks greps is tricky. Don't try this at home folks.
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ripgrep 0.9.0 is out! (multi-line support is anticipated for the next release if all goes well!)
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Also, apparently, you can swap out the chips on the aftermarkert carts with the chips from your genuine carts. But I don't have my genuine carts any more. So I had to buy new ones. I'll definitely be trying the chip swap once the genuine carts run out.
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Yet another byproduct of this is A Regex Barometer, which I believe is the most comprehensive public regex benchmark to date.
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JavaScript dates will be fixed by Temporal. In Rust, you can get (almost) all of the benefits of Temporal today by using Jiff. :-)
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