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 X (formerly Twitter) or @ThisWeekinRust on mastodon.social, or send us a pull request. Want to get involved? We love contributions.

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Updates from Rust Community

Official

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Crate of the Week

This week's crate is eval-macro, a crate that allows to evaluate macros at compile time, giving similar feel to Zig's comptime.

Thanks to Aleksander Krauze for the suggestion!

Please submit your suggestions and votes for next week!

Calls for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization.

If you are a feature implementer and would like your RFC to appear in this list, add a 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.

Let us know if you would like your feature to be tracked as a part of this list.

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.

No Calls for participation were submitted this week.

If you are a Rust project owner and are looking for contributors, please submit tasks here or through a PR to TWiR or by reaching out on X (formerly Twitter) or Mastodon!

CFP - Events

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 website through a PR to TWiR or by reaching out on X (formerly Twitter) or Mastodon!

Updates from the Rust Project

555 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

This week we had to merge a lot of large rollups due to many problems with our CI infrastructure, which made analysis harder. Even though the aggregated stats look like there were a lot of regressions, it is skewed by two large regressions happening on an uncommon optimized incremental build and a documentation build of a single crate. The documentation regression is being tracked, and fixes to some other regressions are already in progress.

Triage done by @kobzol. Revision range: daf59857..9fb94b32

Summary:

(instructions:u) mean range count
Regressions ❌
(primary)		 1.2% [0.2%, 58.8%] 149
Regressions ❌
(secondary)		 4.2% [0.2%, 165.8%] 127
Improvements ✅
(primary)		 -1.1% [-14.0%, -0.3%] 31
Improvements ✅
(secondary)		 -2.9% [-38.4%, -0.1%] 43
All ❌✅ (primary) 0.8% [-14.0%, 58.8%] 180

2 Regressions, 2 Improvements, 5 Mixed; 4 of them in rollups 37 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

Rust
Rust RFCs

Other Areas

Let us know if you would like your PRs, Tracking Issues or RFCs to be tracked as a part of this list.

New and Updated RFCs

Upcoming Events

Rusty Events between 2025-03-12 - 2025-04-09 🦀

Virtual

Asia

Europe

North America

South 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.

Jobs

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

Quote of the Week

Treat anything starting with cargo as if it is cargo run. This applies even to commands that do not build anything, such as cargo clean, and third-party plugins, such as cargo audit.

– Sergey "Shnatsel" Davidoff on /r/rust

Thanks to llogiq for the suggestion!

Please submit quotes and vote for next week!

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

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