This Week in Rust
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This Week in Rust 675

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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This week's crate is offline-protocol, a crate that supplies mesh-networking/peer discovery for a variety of networks, under AGPL/proprietary license.

Thanks to Gokul for the self-suggestion!

Please submit your suggestions and votes for next week!

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.

No calls for testing were issued this week by Rust, Cargo, Rustup or Rust language RFCs.

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

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 Bluesky or Mastodon!

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 Bluesky or Mastodon!

609 pull requests were merged in the last week

Another week of positive changes. Few unexpected improvements from cleanups and a handful of targeted optimizations. Apart from instruction count improvements, we also merged a large reduction of query cache size in #164300. Negative changes come mostly from unexpected doc regression, which is currently under investigation.

Triage done by @panstromek. Revision range: bd4c6cc4..019b59d8

Summary:

(instructions:u) mean range count
Regressions ❌
(primary)		 0.8% [0.2%, 6.8%] 25
Regressions ❌
(secondary)		 6.8% [0.0%, 189.1%] 34
Improvements ✅
(primary)		 -0.8% [-12.6%, -0.1%] 195
Improvements ✅
(secondary)		 -1.2% [-10.6%, -0.1%] 157
All ❌✅ (primary) -0.6% [-12.6%, 6.8%] 220

3 Regressions, 6 Improvements, 3 Mixed 32 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:

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

Rust

Rust RFCs

Compiler Team (MCPs only)

No Items entered Final Comment Period this week for Cargo, Language Team, Language Reference 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

  • No New or Updated RFCs were created this week.

Rusty Events between 2026-10-28 - 2026-11-25 🦀

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

we're at the 25 minute mark and still bikeshedding tabs vs spaces

– Josh Triplett in a Library Team meeting

Thanks to Theemathas for the suggestion!

Please submit quotes and vote for next week!

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