This Week in Rust

This Week in Rust 654

2026-06-03T00:00:00-04:00

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Foundation

Help Fund the People Who Build Rust - The Rust Foundation

Official

Launching the Rust Foundation Maintainers Fund

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Research

Counterfactuals via the Causal Monad in Rust

Crate of the Week

This week's crate is remyx, a framework for building TUIs on top of Ratatui.

Thanks to Manuel Garcia de la Vega 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.

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.

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 Bluesky 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.

Scientific Computing in Rust 2026| 2026-06-05 | Virtual | 2026-07-08 - 2026-07-10

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!

Updates from the Rust Project

500 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

This week we saw nice wins across the board thanks to merging several compiler queries together (#155678), and also substantial improvements in doc performance thanks to doing less work when sorting trait impls (#157179).

Triage done by @Kobzol. Revision range: 783eb8c8..4804ad7e

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.3%	[0.1%, 0.7%]	14
Regressions ❌ (secondary)	0.4%	[0.1%, 0.9%]	39
Improvements ✅ (primary)	-0.9%	[-6.8%, -0.2%]	111
Improvements ✅ (secondary)	-1.1%	[-2.9%, -0.1%]	53
All ❌✅ (primary)	-0.8%	[-6.8%, 0.7%]	125

3 Regressions, 1 Improvement, 2 Mixed; 4 of them in rollups 35 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

Compiler Team (MCPs only)

Unsafe Code Guidelines

Can references to uninhabited types ever be valid?

No Items entered Final Comment Period this week for Rust RFCs, Cargo, Language Team, Language Reference or Leadership Council. 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 2026-06-03 - 2026-07-01 🦀

South America

2026-06-18 | Florianópolis, BR | Rust SC
- Rust Floripa

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

If memory safety bugs were Waldo (Wally): finding them in C programs is a "Where's Waldo?" game, and Rust's unsafe simplifies it to "Is this Waldo?"

– kornel on rust-users

Thanks to Moy2010 for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 653

2026-05-27T00:00:00-04:00

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Newsletters

Scientific Computing in Rust #18 (May 2026)

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Content-addressed Rust builds (or, what kache actually caches)

Crate of the Week

This week's crate is inline_tweak, a crate to embed tweakable constants inside your Rust application without full recompilation.

Thanks to Kill The Mule 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.

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.

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.

rust cookbook - Expand Command Line section with clap derive, subcommands, and env vars

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!

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.

No Calls for papers or presentations were submitted this week.

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!

Updates from the Rust Project

352 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

stabilize --remap-path-prefix in rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

This week was largely positive, with most of the improvements coming from algorithm change in visibility checking: #156228.

Triage done by @panstromek. Revision range: 281c97c3..783eb8c8

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.4%	[0.1%, 0.7%]	5
Regressions ❌ (secondary)	0.5%	[0.1%, 1.1%]	16
Improvements ✅ (primary)	-0.9%	[-6.6%, -0.1%]	164
Improvements ✅ (secondary)	-0.4%	[-1.3%, -0.1%]	51
All ❌✅ (primary)	-0.9%	[-6.6%, 0.7%]	169

2 Regressions, 2 Improvements, 5 Mixed; 2 of them in rollups 34 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:

Propose the concept of a crates.io username for identity

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

Compiler Team (MCPs only)

Rust

Rust RFCs

Avoid linting unreachable_code on todo!()

Unsafe Code Guidelines

What are the values of a union type? (in particular, what is the validity invariant of a union)

No Items entered Final Comment Period this week for Cargo, Language Team, Language Reference or Leadership Council. 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.

Upcoming Events

Rusty Events between 2026-05-27 - 2026-06-24 🦀

Virtual

2026-05-27 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-02 | Virtual | libp2p Events
- rust-libp2p Open Maintainers Call
2026-06-02 | Virtual (Tel Aviv-yafo, IL) | Rust 🦀 TLV
- ‎שיחה חופשית ווירטואלית על ראסט
2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-06-04 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
- Exploring FalkorDB - Learning to use a Graph Database in Rust
2026-06-06 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-06-10 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-16 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-06-17 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Jiff
2026-06-17 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-18 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- June, 2026 SRUG (Seattle Rust User Group) Meetup
2026-06-18 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-06-21 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: Third Sunday
2026-06-23 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-06-23 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: What the heck are monads - and how do we fake them in Rust

Asia

2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
- AI Agents and Open Source LLM (Call for Speakers)

Europe

2026-05-28 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #68
2026-05-28 | London, UK | Rust London User Group
- LDN Talks May Community Showcase
2026-05-29 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-05-30 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #26
2026-06-02 | Frankfurt, DE | Rust Rhein-Main
- gRPC with Rust and Tonic
2026-06-03 | Dublin, IE | Rust Dublin
- Join us live and INPERSON for Rust 261
2026-06-03 | Girona, ES | Rust Girona
- Rust Girona Hack & Learn 06 2026
2026-06-10 | München, DE | Rust Munich
- Rust Munich 2026 / 2 - Hacking Evening
2026-06-11 | Switzerland, CH | PostTenebrasLab
- Rust Meetup Geneva
2026-06-12 - 2026-06-14 | Kraków, PL | Rustmeet
- Rustmeet
2026-06-16 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Interactive: Everything is Open Source
2026-06-16 | Milano, IT | Rust Language Milan
- Real-time planning in Rust: SolverForge & SERIO
2026-06-18 | Aarhus, DK | Rust Aarhus
- Talk Night at Danske Commodities

North America

2026-05-27 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-05-28 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-05-28 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust in Embedded & Autonomous Systems at Parallel Systems in DTLA
2026-05-28 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-05-30 | Boston, MA, US | Boston Rust Meetup
- Central Cambridge Rust Lunch, May 30
2026-06-04 | Saint Louis, MO, US | STL Rust
- Testing, Coverage, Tracey & Mutations
2026-06-06 | Boston, MA, US | Boston Rust Meetup
- Boston Common Rust Lunch, June 6
2026-06-11 | Lehi, UT, US | Utah Rust
- Utah Rust June Meetup
2026-06-11 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-06-11 | San Diego, CA, US | San Diego Rust
- San Diego Rust June Meetup - Back in person!
2026-06-16 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-06-17 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Jiff
2026-06-18 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- June, 2026 SRUG (Seattle Rust User Group) Meetup
2026-06-24 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-06-24 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust-Based Constraint Solvers in 2D Sketching with Zoo Technologies

South America

2026-06-18 | Florianópolis, BR | Rust SC
- Rust Floripa

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

This overflows the trait solver today as well as my brain

– Nadrieril on their blog

Thanks to Theemathas for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 652

2026-05-20T00:00:00-04:00

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Official

Newsletters

This Month in Rust OSDev: April 2026

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Crate of the Week

This week's crate is cargo-crap, a cargo subcommand to calculate the Change Risk Anti-Patterns metric for a crate.

Despite a lamentable lack of suggestions, llogiq is pleased with his choice.

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.

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.

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 Bluesky 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.

Scientific Computing in Rust 2026| 2026-06-05 | Virtual | 2026-07-08 - 2026-07-10

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!

Updates from the Rust Project

369 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Fewer than usual PRs merged, mostly due to a shorter week than normal and some CI trouble. Overall a slightly positive week for performance.

Triage done by @simulacrum. Revision range: 29b75901..281c97c3

0 Regressions, 0 Improvements, 4 Mixed; 1 of them in rollups 17 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:

Cargo RFC for min publish age

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

Compiler Team (MCPs only)

No Items entered Final Comment Period this week for Rust, Rust RFCs, Cargo, Language Team, Language Reference, Leadership Council 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

Documentation interpolation

Upcoming Events

Rusty Events between 2026-05-20 - 2026-06-17 🦀

Virtual

2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Mouse Control with Rust
2026-05-20 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- May, 2026 SRUG (Seattle Rust User Group) Meetup
2026-05-21 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-05-21 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Tock OS Part #4 - Capsule coding in QEMU!
2026-05-26 | Virtual (Cardiff, GB) | Rust and C++ Cardiff
- Hybrid event with Rust Dortmund!
2026-05-26 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-05-26 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: Seeing Into Your Code - A Practical Guide to Tracing in Rust
2026-05-27 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-02 | Virtual | libp2p Events
- rust-libp2p Open Maintainers Call
2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-06-10 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-16 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-06-02 | Virtual | libp2p Events
- rust-libp2p Open Maintainers Call
2026-06-17 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-17 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Rust Study/Hack/Hang-out

Asia

2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
- AI Agents and Open Source LLM (Call for Speakers)

Europe

2026-05-18 - 2026-05-23 | Utrecht, NL | RustWeek 2026
- RustWeek 2026
2026-05-21 | Amsterdam, NL | RustNL
- RustWeek Hackathon
2026-05-22 | Amsterdam, NL | RustNL
- Walking Tour around Utrecht
2026-05-22 | Amsterdam, NL | RustNL
- Bike tour around Utrecht
2026-05-26 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Agentic Programming - May
2026-05-26 | Manchester, UK | Rust Manchester
- Rust Manchester May Code Night
2026-05-26 | Trondheim, NO | Rust Trondheim
- Motorized blinds, and replacing Docker, in Rust!
2026-05-28 | London, UK | Rust London User Group
- LDN Talks May Community Showcase
2026-05-29 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-06-03 | Dublin, IE | Rust Dublin
- Join us live and INPERSON for Rust 261
2026-06-03 | Girona, ES | Rust Girona
- Rust Girona Hack & Learn 06 2026
2026-06-11 | Switzerland, CH | PostTenebrasLab
- Rust Meetup Geneva
2026-06-16 | Leipzig, SN, DE | Rust - Modern Systems Programming in Leipzig
- Interactive: Everything is Open Source

North America

2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Mouse Control with Rust
2026-05-20 | San Francisco, CA, US | Bay Area Rust Meetup
- Bay Area Rust Meetup
2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- May, 2026 SRUG (Seattle Rust User Group) Meetup
2026-05-21 | New York, NY, US | Rust NYC
- Rust NYC: "Boring File Storage" & "Indie News Feed Optimization"
2026-05-21 | Nashville, TN, US | Music City Rust Developers
- Community Meetup
2026-05-23 | Boston, MA, US | Boston Rust Meetup
- Allston Rust Lunch, May 23
2026-05-27 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-05-28 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-05-28 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust in Embedded & Autonomous Systems at Parallel Systems in DTLA
2026-05-28 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-05-30 | Boston, MA, US | Boston Rust Meetup
- Central Cambridge Rust Lunch, May 30
2026-06-04 | Saint Louis, MO, US | STL Rust
- Testing, Coverage, Tracey & Mutations
2026-06-06 | Boston, MA, US | Boston Rust Meetup
- Boston Common Rust Lunch, June 6
2026-06-11 | Lehi, UT, US | Utah Rust
- Utah Rust June Meetup
2026-06-11 | San Diego, CA, US | San Diego Rust
- San Diego Rust June Meetup - Back in person!
2026-06-16 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person

Oceania

2026-05-26 | Barton, ACT, AU | Canberra Rust User Group
- May Meetup

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

Posts like this are useful for those of us who like to help, and who work on rustc to make it more helpful, by letting us learn about what kinds of mistakes people make.

– Kevin Reid on rust-users

Thanks to firebits.io for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

This Week in Rust 651

2026-05-13T00:00:00-04:00

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Foundation

Rust Foundation and Package Registry Leaders Unite to Address Open Source Sustainability Crisis

Newsletters

The Embedded Rustacean Issue #71

Project/Tooling Updates

Observations/Thoughts

Killing a Cow made my JSON formatter 42% faster
Getting Started with Geospatial Rust — What satellites measure, spectral bands, indices, cloud detection.
Lessons Learned Building High-Performance Rust Profiler
The limits of Rust, or why you should probably not follow Amazon, Cloudflare and Discord
The hidden cost of mpsc channels
"Respectful" YAML patching in Rust

Rust Walkthroughs

Learn Rust Generics and Traits By Building a Mini Blackjack Game
Build a Full-Featured Text Editor From Scratch | 0xKiire
Where the sun keeps shinin': the provider pattern
End-to-End Geospatial Processing with EORST — Build a satellite pipeline in Rust: STAC query to GeoTIFF.
All the ways to mock your Rust code
Rust in Android Development: Complete Guide

Miscellaneous

Announcing the 2026 Rust-Edu Refresh and CFP

Crate of the Week

This week's crate is cloakrs, a library and CLI tool for detecting and masking personally identifiable information.

Despite having no suggestion to work with, llogiq is content with his choice.

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.

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.

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 Bluesky 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.

Scientific Computing in Rust 2026| 2026-06-05 | Virtual | 2026-07-08 - 2026-07-10

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!

Updates from the Rust Project

502 pull requests were merged in the last week

Compiler

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

This week saw a couple of PRs affecting the new trait solver, which is steadily moving forward, in particular #156139 was a massive perf. win. #156185 optimized visibility computation, resulting in up to a 8% win on the typenum crate.

Triage done by @Kobzol. Revision range: 1d72d7e8..aa31d6d8

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.3%	[0.1%, 0.4%]	62
Regressions ❌ (secondary)	0.5%	[0.1%, 1.5%]	77
Improvements ✅ (primary)	-1.7%	[-8.8%, -0.2%]	18
Improvements ✅ (secondary)	-13.6%	[-85.6%, -0.0%]	34
All ❌✅ (primary)	-0.2%	[-8.8%, 0.4%]	80

2 Regressions, 2 Improvements, 5 Mixed; 4 of them in rollups 31 artifact comparisons made in total

Full report here.

New rule layout.repr.c.struct.align-empty

Leadership Council

Establish the funding team

No Items entered Final Comment Period this week for Cargo, Compiler Team (MCPs only), 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

No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2026-05-13 - 2026-06-10 🦀

Virtual

2026-05-17 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: Third Sunday
2026-05-19 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Mouse Control with Rust
2026-05-20 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- May, 2026 SRUG (Seattle Rust User Group) Meetup
2026-05-21 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-05-21 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Tock OS Part #4 - Capsule coding in QEMU!
2026-05-26 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-05-26 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: Seeing Into Your Code - A Practical Guide to Tracing in Rust
2026-05-27 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session
2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Rust Deep Learning: First Sunday
2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-06-10 | Virtual (Girona, ES) | Rust Girona
- Weekly coding session

Asia

2026-05-13 | Malaysia, MY | Rust Meetup Malaysia
- Rust Meetup May 2026
2026-05-14 | Seoul, KR | Seoul Rust (Programming Language) Meetup
- Seoul Rust Meetup
2026-05-16 | Bangalore, IN | Rust Bangalore
- May 2026 Rustacean meetup
2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
- AI Agents and Open Source LLM (Call for Speakers)

Europe

2026-05-13 | Girona, ES | Rust Girona
- Rust Girona Hack & Learn 05 2026
2026-05-14 | Switzerland, CH | PostTenebrasLab
- Rust Meetup Geneva
2026-05-18 - 2026-05-23 | Utrecht, NL | RustWeek 2026
- RustWeek 2026
2026-05-18 | Milano, MI, IT | Rust Language Milan
- RustWeek 2026
2026-05-19 | Aarhus, DK | Rust Aarhus
- Hack Night
2026-05-19 | Amsterdam, NL | RustNL
- RustWeek 2026 announcement
2026-05-19 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
- Cross-Building & Cross-Testing
2026-05-19 | London, UK | Women in Rust
- RustWeek lunch meetup
2026-05-21 | Amsterdam, NL | RustNL
- RustWeek Hackathon
2026-05-22 | Amsterdam, NL | RustNL
- Bike tour around Utrecht
2026-05-26 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Agentic Programming - May
2026-05-26 | Manchester, UK | Rust Manchester
- Rust Manchester May Code Night
2026-05-29 | Berlin, DE | Rust Berlin
- Rust Berlin Talks: The next generation
2026-06-03 | Dublin, IE | Rust Dublin
- Join us live and INPERSON for Rust 261

North America

2026-05-14 | Lehi, UT, US | Utah Rust
- Utah Rust May Meetup
2026-05-14 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-05-14 | Portland, OR, US | PDXRust
- From Radio Waves to Pixels - Real-Time Visualizations with Rust and WebAssembly
2026-05-14 | San Diego, CA, US | San Diego Rust
- San Diego Rust May Meetup - Back in person!
2026-05-16 | Boston, MA, US | Boston Rust Meetup
- Lechmere Rust Lunch, May 16
2026-05-19 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Mouse Control with Rust
2026-05-20 | San Francisco, CA, US | Bay Area Rust Meetup
- Bay Area Rust Meetup
2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- May, 2026 SRUG (Seattle Rust User Group) Meetup
2026-05-21 | Nashville, TN, US | Music City Rust Developers
- Community Meetup
2026-05-23 | Boston, MA, US | Boston Rust Meetup
- Allston Rust Lunch, May 23
2026-05-27 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-05-28 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-05-28 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust in Embedded & Autonomous Systems at Parallel Systems in DTLA
2026-05-30 | Boston, MA, US | Boston Rust Meetup
- Central Cambridge Rust Lunch, May 30
2026-06-04 | Saint Louis, MO, US | STL Rust
- Testing, Coverage, Tracey & Mutations
2026-06-06 | Boston, MA, US | Boston Rust Meetup
- Boston Common Rust Lunch, June 6

Oceania

2026-05-14 | Melbourne, AU | Rust Melbourne
- Rust Melbourne - May 2026
2026-05-26 | Barton, ACT, AU | Canberra Rust User Group
- May Meetup

South America

2026-05-13 | Montevideo, UY | Rust Meetup Uruguay
- Rust Uruguay meetup de Mayo

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

Of the last 150 merged PRs to Bun, 108 are memory-safety-adjacent — missed cleanup on an error path, use-after-free, uninitialized reads, out-of-bounds access, reentrancy. 75 of those would not compile in a language with destructors, move semantics, and a borrow checker. One in three PRs we ship is "forgot to free something on an error path."

Of the 108, ~88 are in Zig. The ~14 in C++ are mostly ref-cycles and GC-concurrency races — the residual class that survives any language. So the Zig→Rust delta is real: the Zig bugs are exactly the destructor/ownership-fixable kind, and the C++ side is already near the floor.

Without stronger compile-time guarantees, this stays a cat-and-mouse game. The proposal is to remove the largest bug class structurally rather than fix instances of it indefinitely.

– Jarred Sumner on the bun github Thanks to Brian Kung for the suggestion!

Please submit quotes and vote for next week!

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