This Week in Rust

This Week in Rust 642

TWiR Contributors — Wed, 11 Mar 2026 00:00:00 -0400

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

Official

Announcing Rust 1.94.0 | Rust Blog

Newsletters

🦀 State of Rust Survey Findings

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Crate of the Week

This week's crate is sentencex, a fast sentence segmentation library.

Thanks to Santhosh Thottingal 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.

Rust India Conference 2026 | CFP open until 2026-03-14 | Bangalore, IN | 2026-04-18
Oxidize Conference | CFP open until 2026-03-23 | Berlin, Germany | 2026-09-14 - 2026-09-16
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17

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

483 pull requests were merged in the last week

Compiler

enable PassMode::Indirect { on_stack: true, .. } tail call arguments

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Almost no regressions this week, while there was a handful of performance improvements caused by the ongoing refactoring of the compiler query system. The largest one was from #153521.

Triage done by @kobzol. Revision range: ddd36bd5..3945997a

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.4%	[0.4%, 0.5%]	3
Regressions ❌ (secondary)	0.6%	[0.1%, 1.2%]	8
Improvements ✅ (primary)	-0.9%	[-2.5%, -0.1%]	110
Improvements ✅ (secondary)	-0.8%	[-2.7%, -0.1%]	77
All ❌✅ (primary)	-0.9%	[-2.5%, 0.5%]	113

0 Regressions, 6 Improvements, 3 Mixed; 5 of them in rollups 31 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

Remove ATTRIBUTE_ORDER

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

RFC: Custom lint profiles

Upcoming Events

Rusty Events between 2026-03-11 - 2026-04-08 🦀

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

Happy "Clippy, you are very helpful" day for those who celebrates!

– Manpacket on functional.cafe

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

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 641

TWiR Contributors — Wed, 04 Mar 2026 00:00:00 -0500

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

2025 State of Rust Survey Results

Newsletters

The Embedded Rustacean Issue #66

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

TokioConf Update: What to Expect

Crate of the Week

This week's crate is office2pdf, a standalone library or binary to generate PDF from OOXML (docx, xlsx, etc.) files.

Thanks to One 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.

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.

Rust India Conference 2026 | CFP open until 2026-03-14 | Bangalore, IN | 2026-04-18
Oxidize Conference | CFP open until 2026-03-23 | Berlin, Germany | 2026-09-14 - 2026-09-16
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17

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

414 pull requests were merged in the last week

Compiler

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

A positive week with a few nice improvements coming from query system cleanups.

Triage done by @panstromek. Revision range: eeb94be7..ddd36bd5

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.3%	[0.3%, 0.3%]	1
Regressions ❌ (secondary)	0.2%	[0.0%, 0.3%]	3
Improvements ✅ (primary)	-0.8%	[-2.1%, -0.1%]	141
Improvements ✅ (secondary)	-1.1%	[-6.6%, -0.1%]	90
All ❌✅ (primary)	-0.8%	[-2.1%, 0.3%]	142

2 Regressions, 5 Improvements, 5 Mixed; 4 of them in rollups 30 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)

Language Reference

Mitigation enforcement

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

No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2026-03-04 - 2026-04-01 🦀

Virtual

2026-03-04 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Getting Started with Rust Part 4: Module Handling in a Project
2026-03-04 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-03-05 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Presentation: Tock OS Part #3 - Capsules and lower-level hardware drivers
2026-03-05 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-03-07 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-03-10 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-03-10 | Virtual (London, UK) | Women in Rust
- 👋 Community Catch Up
2026-03-11 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-03-12 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-17 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-03-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Embedded Rust
2026-03-18 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Hybrid event with Rust Dortmund!
2026-03-18 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-20 | Virtual | Packt Publishing Limited
- Rust Adoption, Safety, and Cloud with Francesco Ciulla
2026-03-24 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-03-24 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: Crates, Tips & Tricks Lightning Talks - Bring your ideas!
2026-03-25 | Virtual (Girona, ES) | Rust Girona
- Rust Girona Hack & Learn 03 2026
2026-03-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-04-01 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-04-01 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing

Asia

2026-03-22 | Tel Aviv-yafo, IL | Rust 🦀 TLV
- In person Rust March 2026 at AWS in Tel Aviv

Europe

2026-03-04 | Barcelona, ES | BcnRust
- Rust at MWC Talent Arena — Workshops + Community Meetup
2026-03-04 | Hamburg, DE | Rust Meetup Hamburg
- Rust Hack & Learn March 2026
2026-03-04 | Köln, DE | Rust Cologne
- Rust in March: Abstractions, but at what cost?
2026-03-04 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Records, Shredded on Ice: A Primer on Parquet and Iceberg
2026-03-04 | Paris, FR | Rust Paris
- Rust meetup #83
2026-03-05 | Oslo, NO | Rust Oslo
- Rust Hack'n'Learn at Kampen Bistro
2026-03-11 | Amsterdam, NL | Rust Developers Amsterdam Group
- Meetup @ Instruqt
2026-03-11 | Frankfurt, DE | Rust Rhein-Main
- Writing a Python compiler in Rust
2026-03-12 | Bern, CH | Rust Bern
- 2026 Rust Talks Bern #1 @bespinian
2026-03-12 | Geneva, CH | Post Tenebras Lab
- Rust Meetup Geneva
2026-03-18 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Intro to Embedded Rust - March
2026-03-19 - 2026-03-20 | Warsaw, PL | Rustikon
- Rustikon Conference
2026-03-24 | Aarhus, DK | Rust Aarhus
- Hack Night - Advent of Code
2026-03-24 | Manchester, UK | Rust Manchester
- Rust Manchester March Code Night
2026-03-27 | Paris, FR | Rust in Paris
- Rust in Paris
2026-04-01 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Rust/ACCU meetup.

North America

2026-03-04 | New York, NY, US | Rust NYC
- Rust NYC: Custom Metrics Collector & Embedded Rust!
2026-03-05 | Chicago, IL, US | Chicago Rust Meetup
- Rust Happy Hour
2026-03-05 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-03-05 | Saint Louis, MO, US | STL Rust
- Rust Project Night
2026-03-07 | Boston, MA, US | Boston Rust Meetup
- MIT Rust Lunch, Mar 7
2026-03-12 | Lehi, UT, US | Utah Rust
- An Interpreter for Computability theory, Written the Hard Way
2026-03-14 | Boston, MA, US | Boston Rust Meetup
- North End Rust Lunch, Mar 14
2026-03-17 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-03-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Embedded Rust
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-19 | Nashville, TN, US | Music City Rust Developers
- Applied Rust - Building Rust Applictions
2026-03-21 | Boston, MA, US | Boston Rust Meetup
- Porter Square Rust Lunch, Mar 21
2026-03-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-03-26 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl

Oceania

2026-03-12 | Brisbane City, AU | Rust Brisbane
- Rust Brisbane Mar 2026
2026-03-26 | Melbourne, AU | Rust Melbourne
- TBD March Meetup

South America

2026-03-21 | São Paulo, BR | Rust São Paulo Meetup
- Encontro do Rust-SP (migrado pro Lumma)

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

After all, Rust only became as good as it is by going through a rather drastic transformation. At one point it had a GC and Green Threads, famously. There's no substitute for making it exist and seeing how it does on a real problem.

– scottmcm on rust-users

Thanks to Jonas Fassbender 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 640

TWiR Contributors — Wed, 25 Feb 2026 00:00:00 -0500

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

Foundation

Guest Blog: FOSDEM 2026 — Rust Devroom in Review

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Research

Auditing Rust Crates Effectively

Miscellaneous

Hieratic Prompt Compression: From Prototype to Production

Crate of the Week

This week's crate is docstr, a macro crate providing a macro to create multiline strings out of doc comments.

Thanks to Nik Revenco 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.

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.

Rust India Conference 2026 | CFP open until 2026-03-14 | Bangalore, IN | 2026-04-18
Oxidize Conference | CFP open until 2026-03-23 | Berlin, Germany | 2026-09-14 - 2026-09-16
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17

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

450 pull requests were merged in the last week

Compiler

Library

Cargo

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Overall, a bit more noise than usual this week, but mostly a slight improvement with several low-level optimizations at MIR and LLVM IR building landing. Also less commits landing than usual, mostly due to GitHub CI issues during the week.

Triage done by @simulacrum. Revision range: 3c9faa0d..eeb94be7

3 Regressions, 4 Improvements, 4 Mixed; 3 of them in rollups 24 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)

Cargo

feat(help): display manpage for nested commands

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

Upcoming Events

Rusty Events between 2026-02-25 - 2026-03-25 🦀

Virtual

2026-02-25 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Getting Started with Rust Part 3: Patterns and Matching
2026-02-25 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-02-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-04 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-03-05 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Presentation: Tock OS Part #3 - Capsules and lower-level hardware drivers
2026-03-05 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-03-07 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-03-10 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-03-10 | Virtual (London, UK)| Women in Rust
- 👋 Community Catch Up
2026-03-11 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-03-12 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-17 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-03-18 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-03-18 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Embedded Rust
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-20 | Virtual | Packt Publishing Limited
- Rust Adoption, Safety, and Cloud with Francesco Ciulla
2026-03-24 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-03-24 | Virtual (London, UK) | Women in Rust
- Lunch & Learn: Crates, Tips & Tricks Lightning Talks - Bring your ideas!
2026-03-25 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session

Asia

2026-03-22 | Tel Aviv-yafo, IL | Rust 🦀 TLV
- In person Rust March 2026 at AWS in Tel Aviv

Europe

2026-02-25 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #65 Sponsored by Factbird
2026-02-26 | Prague, CZ | Rust Czech Republic
- Informační teorie vs. filtry: Proč filtrování bitcoinového mempoolu NEFUNGUJE
2026-02-28 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #24 - crablings edition
2026-03-04 | Barcelona, ES | BcnRust
- Rust at MWC Talent Arena — Workshops + Community Meetup
2026-03-04 | Hamburg, DE | Rust Meetup Hamburg
- Rust Hack & Learn March 2026
2026-03-04 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Records, Shredded on Ice: A Primer on Parquet and Iceberg
2026-03-05 | Oslo, NO | Rust Oslo
- Rust Hack'n'Learn at Kampen Bistro
2026-03-11 | Amsterdam, NL | Rust Developers Amsterdam Group
- Meetup @ Instruqt
2026-03-12 | Geneva, CH | Post Tenebras Lab
- Rust Meetup Geneva
2026-03-18 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Intro to Embedded Rust - March
2026-03-19 - 2026-03-20 | | Rustikon
- Rustikon Conference
2026-03-24 | Aarhus, DK | Rust Aarhus
- Hack Night - Advent of Code

North America

2026-02-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-02-25 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust as a Glue Layer- Infrastructure for AI-Native Applications
2026-02-26 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-02-26 | New York, NY, US | Rust NYC
- Rust NYC: Compile-Time Solutions
2026-02-28 | Boston, MA, US | Boston Rust Meetup
- Boston University Rust Lunch, Feb 28
2026-03-05 | Saint Louis, MO, US | STL Rust
- TBD
2026-03-07 | Boston, MA, US | Boston Rust Meetup
- MIT Rust Lunch, Mar 7
2026-03-14 | Boston, MA, US | Boston Rust Meetup
- North End Rust Lunch, Mar 14
2026-03-17 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person
2026-03-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- March, 2026 SRUG (Seattle Rust User Group) Meetup
2026-03-21 | Boston, MA, US | Boston Rust Meetup
- Porter Square Rust Lunch, Mar 21
2026-03-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground

Oceania

2026-03-26 | Melbourne, VIC, AU | Rust Melbourne
- TBD March 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

This is actually just Rust adding support for C++-style duck-typed templates, and the long and mostly-irrelevant information contained in the ICE message is part of the experience.

– robofinch on rust-users

Thanks to Kyllingene 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 639

TWiR Contributors — Wed, 18 Feb 2026 00:00:00 -0500

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

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Crate of the Week

This week's crate is banish, a proc macro to build rule-driven state machines using a declarative DSL.

Thanks to Logan Flaherty 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.

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.

Rust India Conference 2026 | CFP open until 2026-03-14 | Bangalore, IN | 2026-04-18
Oxidize Conference | CFP open until 2026-03-23 | Berlin, Germany | 2026-09-14 - 2026-09-16

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

564 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

sort stable items first

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

Several pull requests introduced (usually very small) regressions across the board this week. On the other hand, #151380 provided a nice performance win in the inference engine. I would also like to bring attention to #152375, which improved the parallel frontend. It is not shown in this report, because we don't yet have many benchmarks for the parallel frontend, but this PR seemingly improved the check (wall-time) performance with multiple frontend threads on several real-world crates by 5-10%!

Triage done by @kobzol. Revision range: 39219ceb..3c9faa0d

Summary:

(instructions:u)	mean	range	count
Regressions ❌ (primary)	0.7%	[0.2%, 3.1%]	96
Regressions ❌ (secondary)	1.1%	[0.0%, 5.7%]	62
Improvements ✅ (primary)	-0.4%	[-0.9%, -0.2%]	8
Improvements ✅ (secondary)	-2.6%	[-7.0%, -0.0%]	45
All ❌✅ (primary)	0.6%	[-0.9%, 3.1%]	104

2 Regressions, 0 Improvements, 9 Mixed; 4 of them in rollups 36 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)

Add a --min-recursion-limit command line flag

Leadership Council

Participation in Outreachy (dedication of funds)

No Items entered Final Comment Period this week for Rust RFCs, 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.

2026-02-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Rust Study/Hack/Hang-out
2026-02-18 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-02-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- February, 2026 SRUG (Seattle Rust User Group) Meetup
2026-02-24 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Fourth Tuesday
2026-02-24 | Virtual (London, UK) | Women in Rust
- Lunch & learn: Rust Pattern Matching Unpacked
2026-02-25 | Virtual (Girona, ES) | Rust Girona
- Sessió setmanal de codificació / Weekly coding session
2026-02-26 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-04 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - with Social Distancing
2026-03-05 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
- Presentation: Tock OS Part #3 - Capsules and lower-level hardware drivers
2026-03-05 | Virtual (Nürnberg, DE) | Rust Nuremberg
- Rust Nürnberg online
2026-03-07 | Virtual (Kampala, UG) | Rust Circle Meetup
- Rust Circle Meetup
2026-03-10 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
- Second Tuesday
2026-03-10 | Virtual (London, UK)| Women in Rust
- 👋 Community Catch Up
2026-03-12 | Virtual (Berlin, DE) | Rust Berlin
- Rust Hack and Learn
2026-03-17 | Virtual (Washington, DC, US) | Rust DC
- Mid-month Rustful
2026-03-18 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Rust Study/Hack/Hang-out

Asia

2026-02-21 | Bangalore, IN | Rust Bangalore
- February 2026 Rustacean meetup
2026-02-23 | Tel Aviv-yafo, IL | Rust 🦀 TLV
- In person Rust February 2026 at Nuvoton in Herzliya

Europe

2026-02-18 - 2026-02-19 | London, UK | Rust Nation UK
- Rust Nation UK 2026
2026-02-19 | Mountain View, CA, US | Hacker Dojo
- RUST MEETUP at HACKER DOJO
2026-02-24 | Bergen, NO | Rust Bergen
- Rust Bergen #5 @ Zrch: Doom on Embedded
2026-02-24 | Manchester, UK | Rust Manchester
- Rust Manchester February Talk | Event Page
2026-02-25 | Copenhagen, DK | Copenhagen Rust Community
- Rust meetup #65 Sponsored by Factbird
2026-02-26 | Prague, CZ | Rust Czech Republic
- Informační teorie vs. filtry: Proč filtrování bitcoinového mempoolu NEFUNGUJE
2026-02-28 | Stockholm, SE | Stockholm Rust
- Ferris' Fika Forum #24 - crablings edition
2026-03-04 | Barcelona, ES | BcnRust
- Rust at MWC Talent Arena — Workshops + Community Meetup
2026-03-04 | Hamburg, DE | Rust Meetup Hamburg
- Rust Hack & Learn March 2026
2026-03-04 | Oxford, UK | Oxford ACCU/Rust Meetup.
- Records, Shredded on Ice: A Primer on Parquet and Iceberg
2026-03-12 | Geneva, CH | Post Tenebras Lab
- Rust Meetup Geneva
2026-03-18 | Dortmund, DE | Rust Dortmund
- Rust Dortmund Meetup - Intro to Embedded Rust - March

North America

2026-02-18 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
- Rust Study/Hack/Hang-out
2026-02-19 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
- February, 2026 SRUG (Seattle Rust User Group) Meetup
2026-02-19 | Nashville, TN, US | Music City Rust Developers
- Rust 101: What is Rust and how can I use it?
2026-02-21 | Boston, MA, US | Boston Rust Meetup
- Somerville Union Square Rust Lunch, Feb 21
2026-02-25 | Austin, TX, US | Rust ATX
- Rust Lunch - Fareground
2026-02-25 | Los Angeles, CA, US | Rust Los Angeles
- Rust LA: Rust as a Glue Layer- Infrastructure for AI-Native Applications
2026-02-26 | Atlanta, GA, US | Rust Atlanta
- Rust-Atl
2026-02-26 | New York, NY, US | Rust NYC
- Rust NYC: Compile-Time Solutions
2026-02-28 | Boston, MA, US | Boston Rust Meetup
- Boston University Rust Lunch, Feb 28
2026-03-05 | Saint Louis, MO, US | STL Rust
- TBD
2026-03-07 | Boston, MA, US | Boston Rust Meetup
- MIT Rust Lunch, Mar 7
2026-03-14 | Boston, MA, US | Boston Rust Meetup
- North End Rust Lunch, Mar 14
2026-03-17 | San Francisco, CA, US | San Francisco Rust Study Group
- Rust Hacking in Person

Oceania

2026-02-24 | Canberra, AU | Rust Canberra
- February 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

Clearly there is such a thing as too much syntactic sugar (as one of my professors put it, "syntactic sugar causes semantic cancer"), but at the same time also clearly some syntactic sugar is worth having.

– Ralf Jung on rust-internals

Thanks to robofinch for the suggestion!

Please submit quotes and vote for next week!

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