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. If you find any errors in this week's issue, please submit a PR.

This week's crate is goku, a HTTP load tester.

Thanks to Joaquín Caro for the self-suggestion!

Please submit your suggestions and votes for next week!

Call for Participation

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.

Updates from the Rust Project

381 pull requests were merged in the last week

Rust Compiler Performance Triage

Some noisy benchmarks impeded performance review this week. There was a notable improvement to a broad range of primary benchmarks, first from PR #108440, which revised the encodable proc macro to handle the discriminant separately from its fields, and second from PR #108375, which inlined a number of methods that had only a single caller. Both of these PR's were authored by the same contributor; many thanks Zoxc!

Triage done by @pnkfelix. Revision range: 3fee48c1..31f858d9

5 Regressions, 4 Improvements, 6 Mixed; 6 of them in rollups 39 artifact comparisons made in total

Full report

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

RFC: Move std::net::IpAddr types into core::net.

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.

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 RFCs issued a call for testing 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.

Upcoming Events

Rusty Events between 2023-03-01 - 2023-03-29 🦀

Virtual

2023-03-01 | Virtual (Indianapolis, IN, US) | Indy Rust
- Indy.rs - Michael Baykov on Category Theory & Argument Parsing
2023-03-02 | Virtual (Raleigh, NC, US) | Triangle BitDevs
- Rust for Bitcoiners
2023-03-02 | Virtual (Linz, AT) | Rust Linz
- Rust Meetup Linz - 30th Edition
2023-03-07 | Virtual (Buffalo, NY, US) | Buffalo Rust Meetup
- Buffalo Rust User Group, First Tuesdays
2023-03-07 | Virtual (Santa Clara, CA, US) | UCSC Extension Community
- Programming with Rust
2023-03-08 | Virtual (Boulder, CO, US) | Boulder Elixir and Rust
- Monthly Meetup
2023-03-11 | Virtual | Rust GameDev
- Rust GameDev Monthly Meetup
2023-03-14 | Virtual (Berlin, DE) | Berlin.rs
- Rust Hack and Learn
2023-03-14 | Virtual (Dallas, TX, US) | Dallas Rust
- Second Tuesday
2023-03-14 | Virtual (Redmond, WA, US) | Microsoft Reactor Redmond
- Crack code interview problems in Rust: S2 Ep1
2023-03-15 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Injecting Rust Hooks into a 1999 game binary (unsafe)
2023-03-15 | Virtual (Vancouver, BC, CA) | Vancouver Rust
- Rust Study/Hack/Hang-out
2023-03-16 | Virtual (Redmond, WA, US) | Microsoft Reactor Redmond
- Introduction to WebAssembly (WASM) with Rust and WASMEdge
2023-03-16 | Virtual (Stuttgart, DE) | Rust Community Stuttgart
- Rust-Meetup
2023-03-21 | Virtual (Redmond, WA, US) | Microsoft Reactor Redmond
- Crack code interview problems in Rust: S2 Ep2
2023-03-21 | Virtual (Washington, DC, US) | Rust DC
- Rust+Tell Lightning Talks
2023-03-22 | Virtual (Richmond, VA, US) | Rustaceans RVA
- Rustaceans RVA - March Meetup
2023-03-28 | Virtual (Redmond, WA, US) | Microsoft Reactor Redmond
- Crack code interview problems in Rust: S2 Ep3
2023-03-29 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
- Writing your own rust 'book' with mdBook

Asia

2023-03-04 | Kyoto, JP | Kansai Rust
- Fn vs FnMut vs FnOnce

Europe

2023-03-01 | Cologne, DE | Rust Cologne
- Rust traits for Fn and profit
2023-03-02 | Barcelona, ES | BcnRust
- 9th BcnRust Meetup: Full Stack
2023-03-02 | Wrocław, PL | Rust Wrocław
- Rust Wrocław Meetup #32
2023-03-07 | Bratislava, SK | Bratislava Rust Meetup Group
- Rust Meetup by Sonalake
2023-03-09 | Basel, CH | Rust Basel
- Rust Meetup #7
2023-03-09 | Delft, NL | Rust Nederland
- Regular track: Embedded Rust
- Student track: Embedded Rust
2023-03-09 | Lyon, FR | Rust Lyon
- Rust Lyon Meetup #2
2023-03-15 | Nürnberg, DE | Rust Nuremberg
- Walk around Embedded World Exhibition
2023-03-17 | Stuttgart, DE | Rust Community Stuttgart
- OnSite Meeting
2023-03-28 | Zurich, CH | Rust Zurich
- High performance concurrent data structures in Rust - March Meetup

North America

2023-03-01 | Austin, TX, US | Rust ATX
- Rust Lunch
2023-03-09 | Lehi, UT, US | Utah Rust
- Trails, Triumphs, & Travails of Yet-Another-Database-Crate with PJ and Food!

Oceania

2023-03-01 | Sydney, NSW, AU | Rust Sydney
- 🦀 Lightning Talks - We are back!

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.