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 ralertsinua, a text user interface for getting information about Russian air raids in Ukraine.

Thanks to Vladyslav Batyrenko 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.


  • No calls for testing were issued this week.


  • 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

364 pull requests were merged in the last week

Rust Compiler Performance Triage

Fairly quiet week with the exception of a very large improvement coming from the switch to rust-lld on nightly Linux. This can have very large impacts on benchmarks where linking dominates the build time (e.g., ripgrep, exa, small binaries like hello-world). Aside from that change, there were a few small regressions that were either deemed worth it or are still being investigated.

Triage done by @rylev. Revision range: 9105c57b..1d0e4afd


(instructions:u) mean range count
Regressions ❌
0.7% [0.1%, 2.5%] 30
Regressions ❌
0.5% [0.2%, 0.8%] 5
Improvements ✅
-30.4% [-71.7%, -0.4%] 35
Improvements ✅
-25.6% [-70.9%, -0.5%] 75
All ❌✅ (primary) -16.1% [-71.7%, 2.5%] 65

4 Regressions, 1 Improvement, 4 Mixed; 2 of them in rollups 66 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.


  • No RFCs entered Final Comment Period this week.

Tracking Issues & PRs

  • No Cargo Tracking Issues or PRs entered Final Comment Period this week.
Language Team
  • No Language Team RFCs entered Final Comment Period this week.
Language Reference
Unsafe Code Guidelines
  • No Unsafe Code Guideline RFCs entered Final Comment Period this week.

New and Updated RFCs

Upcoming Events

Rusty Events between 2024-05-22 - 2024-06-19 🦀





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.


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

Quote of the Week

In other words, I do not want the compiler to just insert code to uphold the bare minimum guarantees, I want the compiler to check my work for me and assist me in developing an algorithm I can confidently assert is right.

without boats

Thanks to scottmcm 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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