Hello and welcome to another issue of This Week in Rust! Rust is a programming language empowering everyone to build reliable and efficient software. This is a weekly summary of its progress and community. Want something mentioned? Tag us at @ThisWeekInRust on Twitter or @ThisWeekinRust on mastodon.social, or send us a pull request. Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub and archives can be viewed at this-week-in-rust.org. If you find any errors in this week's issue, please submit a PR.

Updates from Rust Community


Project/Tooling Updates


Rust Walkthroughs


Crate of the Week

This week's crate is microflow, a robust and efficient TinyML inference engine for embedded systems.

Thanks to matteocarnelos for the self-suggestion!

Please submit your suggestions and votes for next week!

Call for Participation; projects and speakers

CFP - Projects

Always wanted to contribute to open-source projects but did not know where to start? Every week we highlight some tasks from the Rust community for you to pick and get started!

Some of these tasks may also have mentors available, visit the task page for more information.

If you are a Rust project owner and are looking for contributors, please submit tasks here.

CFP - Speakers

Are you a new or experienced speaker looking for a place to share something cool? This section highlights events that are being planned and are accepting submissions to join their event as a speaker.

  • Devoxx PL 2024 | CFP closes 2024-03-01 | Krakow, Poland | Event date: 2024-06-19 - 2024-06-21
  • RustFest Zürich 2024 CFP closes 2024-03-31 | Zürich, Switzerland | Event date: 2024-06-19 - 2024-06-24

If you are an event organizer hoping to expand the reach of your event, please submit a link to the submission website through a PR to TWiR.

Updates from the Rust Project

466 pull requests were merged in the last week

Rust Compiler Performance Triage

Relatively balanced results this week, with more improvements than regressions. Some of the larger regressions are not relevant, however there was a real large regression on doc builds, that was caused by a correctness fix (rustdoc was doing the wrong thing before).

Triage done by @kobzol. Revision range: 0984becf..74c3f5a1


(instructions:u) mean range count
Regressions ❌
2.1% [0.2%, 12.0%] 44
Regressions ❌
5.2% [0.2%, 20.1%] 76
Improvements ✅
-0.7% [-2.4%, -0.2%] 139
Improvements ✅
-1.3% [-3.3%, -0.3%] 86
All ❌✅ (primary) -0.1% [-2.4%, 12.0%] 183

6 Regressions, 5 Improvements, 8 Mixed; 5 of them in rollups 53 artifact comparisons made in total

Full report here

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

Final Comment Period

Every week, the team announces the 'final comment period' for RFCs and key PRs which are reaching a decision. Express your opinions now.


Tracking Issues & PRs


New and Updated RFCs

  • No New or Updated RFCs were created this week.

Call for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization. The following RFCs would benefit from user testing before moving forward:

If you are a feature implementer and would like your RFC to appear on the above list, add the new call-for-testing label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature need testing.

Upcoming Events

Rusty Events between 2024-02-14 - 2024-03-13 💕 🦀 💕




North America


If you are running a Rust event please add it to the calendar to get it mentioned here. Please remember to add a link to the event too. Email the Rust Community Team for access.


Please see the latest Who's Hiring thread on r/rust

Quote of the Week

For some weird reason the Elixir Discord community has a distinct lack of programmer-socks-wearing queer furries, at least compared to Rust, or even most other tech-y Discord servers I’ve seen. It caused some weird cognitive dissonance. Why do I feel vaguely strange hanging out online with all these kind, knowledgeable, friendly and compassionate techbro’s? Then I see a name I recognized from elsewhere and my hindbrain goes “oh thank gods, I know for a fact she’s actually a snow leopard in her free time”. Okay, this nitpick is firmly tongue-in-cheek, but the Rust user-base continues to be a fascinating case study in how many weirdos you can get together in one place when you very explicitly say it’s ok to be a weirdo.

SimonHeath on the alopex Wiki's ElixirNitpicks page

Thanks to Brian Kung for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, andrewpollack, U007D, kolharsam, joelmarcey, mariannegoldin, bennyvasquez.

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