This Week in Rust 546

⚓ Rust    📅 2024-05-08    👤 freedit    👁️ 75      


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, 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 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 derive_more, a crate for deriving a whole lot of traits

Thanks to teor for the suggestion!

Please submit your suggestions and votes for next 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:

  • No calls for testing were issued this week.



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.

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.

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

426 pull requests were merged in the last week

Rust Compiler Performance Triage

Largely uneventful week; the most notable shifts were considered false-alarms that arose from changes related to cfg-checking (either cargo enabling it, or adding cfg's like rustfmt to the "well-known cfgs list").

Triage done by @pnkfelix. Revision range: c65b2dc9..69f53f5e

3 Regressions, 2 Improvements, 3 Mixed; 5 of them in rollups 54 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

Upcoming Events

Rusty Events between 2024-05-08 - 2024-06-05 🦀





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

Rust and its borrow checker are like proper form when lifting boxes. While you might have been lifting boxes "the natural way" for decades without a problem, and its an initial embuggerance to think and perform proper lifting form, it is learnable, efficient, and prevents some important problems.

Or more succinctly:
C/C++: It'll screw your back(end).

And the reply:

  1. there’s a largish group of men who would feel their masculinity attacked if you implied they should learn it
  2. while it's learnable finding usefully targeted educational resources are hard to come by
  3. proper form while lifting boxes are a really terrible way to model graphs

Brett Witty and Leon on Mastodon

Thanks to Brett Witty for the self-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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