This Week in Rust 604

⚓ rust    📅 2025-06-18    👤 surdeus    👁️ 2      

surdeus

Category: This Week in Rust

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.bsky.social on Bluesky 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.

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Updates from Rust Community

Official

Foundation

Newsletters

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Research

Miscellaneous

Crate of the Week

This week's crate is RobustMQ, a next-generation, high-performance, multi-protocol message queue.

Thanks to Yu Liu for the self-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.

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

461 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Rustfmt

Clippy

#### Rust-Analyzer

Rust Compiler Performance Triage

Relatively quiet week, with a few improvements to benchmarks leveraging the new trait solver.

Triage done by @kobzol. Revision range: c31cccb7..45acf54e

Summary:

(instructions:u) mean range count
Regressions ❌
(primary)		 0.3% [0.1%, 0.5%] 14
Regressions ❌
(secondary)		 0.3% [0.1%, 0.5%] 52
Improvements ✅
(primary)		 -0.5% [-4.8%, -0.1%] 68
Improvements ✅
(secondary)		 -4.3% [-56.5%, -0.1%] 85
All ❌✅ (primary) -0.4% [-4.8%, 0.5%] 82

3 Regressions, 7 Improvements, 4 Mixed; 4 of them in rollups 51 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:

  • No RFCs were approved 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
Cargo
Rust RFCs

No Items entered Final Comment Period this week for Language Reference, Language Team or Unsafe Code Guidelines.

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 2025-06-18 - 2025-07-16 🦀

Virtual

Asia

Europe

North America

Oceania

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

But after a few weeks, it compiled and the results surprised us. The code was 10x faster than our carefully tuned Kotlin implementation – despite no attempt to make it faster. To put this in perspective, we had spent years incrementally improving the Kotlin version from 2,000 to 3,000 transactions per second (TPS). The Rust version, written by Java developers who were new to the language, clocked 30,000 TPS.

This was one of those moments that fundamentally shifts your thinking. Suddenly, the couple of weeks spent learning Rust no longer looked like a big deal, when compared with how long it’d have taken us to get the same results on the JVM. We stopped asking, “Should we be using Rust?” and started asking “Where else could Rust help us solve our problems?”

– Dr. Werner Vogels on his blog

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, U007D, joelmarcey, mariannegoldin, bennyvasquez, bdillo

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