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? Tweet us at @ThisWeekInRust 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.

Updates from Rust Community

Newsletters

• Rust Nigeria #1

Project/Tooling Updates

• rust-analyzer in 2021
• rust-analyzer changelog #110
• The year 2021 in Dimforge and our objectives for 2022
• This week in Fluvio #18: the programmable streaming platform
• What's new in SeaORM 0.5.0
• Ezio
• SixtyFPS (GUI crate): Changelog for 3rd of January 2022
• Introducing Dioxus v0.1
• SNAFU 0.7 Released
• hyper-ish 2021 in review
• This Week in Glean: Glean in 2021
• This week in Databend #23: an elastic and reliable cloud warehouse

Observations/Thoughts

• Ranges and suffering
• Why is my Rust build so slow?
• Implementing Spinlock for RISC-V OS in Rust
• Writing bindings upside down
• Rust 2021 – Looking Back and Forth
• How a Single Line of Code Made a 24-core Server Slower Than a Laptop
• In Defense of Async: Function Colors Are Rusty
• Rust and Valgrind
• Porting Rust's std to rustix
• Improved portability and performance 🦀
• Thoughts on return, break and continue
• Parsing Decimals 4 times faster
• Beyond the Borrow Checker: Differential Fuzzing

Rust Walkthroughs

• Don't shell out!
• 12 Rust Tips and Tricks you might not know yet
• Indexing Strings in Rust and TypeScript: A Case Study of String
• Safe && Portable Data Structure Design
• The joy of building a ray tracer, for fun, in Rust
• An Introduction To Session-based Authentication In Rust
• Profiling linkers
• Debian's approach to Rust - Dependency handling
• Nine Rules for Writing Python Extensions in Rust & Rayon
• Why Rust enums are so cool
• [DE] Auf Nummer sicher: Sicheres Programmieren mit Rust
• [series] [video] Let's build a voice journal in Rust | Ep. 1: audio I/O, SQlite, CLI args
• [series] [video] Rust Embedded for STM32 Microcontrollers - Intro

Miscellaneous

• Fluvio SmartModules with user-defined parameters
• [Audio] LibertyOS with Daniel Teberian
• [Video] Web api benchmarking: Rust (Axum) vs Rust (Warp)
• [Video] Adding while statements to Rena

Crate of the Week

This week's crate is fltk-rs, a crate with bindings to the FLTK GUI toolkit.

Thanks to Mark Summerfield for the suggestion!

Please submit your suggestions and votes for next week!

Call for Participation

Always wanted to contribute to open-source projects but didn't 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

230 pull requests were merged in the last week

• allow loading LLVM plugins with both legacy and new pass manager
• suggest while let x = y when encountering while x = y
• refactor variance diagnostics to work with more types
• extend check for UnsafeCell in consts to cover unions
• parse and suggest moving where clauses after equals for type aliases
• relax priv-in-pub lint on generic bounds and where clauses of trait impls
• perf: store liveness in interval sets for region inference
• add try_reserve and try_reserve_exact for OsString
• support [x; n] expressions in concat_bytes!
• std-simd: impl std::simd::StdFloat
• rustdoc: use ThinVec for GenericArgs bindings
• clippy: extend unused_io_amount to cover async io
• clippy: fix enum_variants false positive on prefixes that are not camel-case
• clippy: fixed issues with to_radians and to_degrees lints
• clippy: limit the identity_op lint to integral operands
• clippy: erasing_op lint ignored when operation Output type is different from the type of constant 0
• clippy: perf: cache test item names
• clippy: fix redundant_closure fp with Rc<F>/Arc<F>
• clippy: wrong_self_convention: match SelfKind::No more restrictively
• rustfmt: do not flatten match arm block with leading attributes
• rustfmt: improve out of line module resolution
• rustfmt: support parsing of asm! args

Rust Compiler Performance Triage

It was a relatively calm, but good week overall. Most of the gains were improvements to rustdoc running times.

Triage done by @pnkfelix. Revision range: e91ad5..2b681a

1 Regressions, 6 Improvements, 1 Mixed; 0 of them in rollups 38 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:

• Amend RFC 3107 to change feature name, fix grammatical error

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.

RFCs

• No new RFCs entered Final Comment Period this week.

Tracking Issues & PRs

• [disposition: merge] Tracking issue for Box::into_pin (feature box_into_pin)
• [disposition: merge] make Instant::{duration_since, elapsed, sub} saturating and remove workarounds

New RFCs

• No new RFCs were published this week.

Upcoming Events

Rusty Events between 1/5/2022 - 2/2/2022 🦀

Online

• January 5, 2022 | Indianapolis, IN, US | Indy.rs - with Social Distancing | Indy Rust
• January 6, 2022 | Cardiff, UK | Rust Book Study Session - Automated Tests & Building a Command Line Program | Rust and C++ Cardiff
• January 6, 2022 | Nürnberg, DE | Rust Nürnberg online #8| Rust Nuremberg
• January 8, 2022 | Various cities | Rust GameDev Monthly Meetup | Rust GameDev
• January 11, 2022 | Dallas, TX, US | Second Tuesday Meetup| Dallas Rust
• January 11, 2022 | Los Gatos, CA, US | Book #24 - Rust for Rustaceans - Chapter 2 | Los Gatos Reading Group
• January 11, 2022 | Seattle, WA, US | Monthly meetup | Seattle Rust Meetup
• January 12, 2022 | Malaysia, MY | Rust Meetup Malaysia | Rust Meetup Malaysia
• January 12, 2022 | Boulder, CO, US | Monthly Meetup | Boulder Elixir and Rust
• January 12, 2022 | Frankfurt, DE | Rust for bare-metal embedded systems | Developing Embedded Systems in Rhein-Main
• January 12, 2022 | Los Angeles, CA, US | Live Coding Session - Mob Programming a Rust Code Kata [Virtual] Jan. 2022 | Rust Los Angeles
• January 12, 2022 | Stuttgart, DE | Rust-Meetup | Rust Community Stuttgart
• January 13, 2022 | Charlottesville, VA, US | Higher kinded polymorphism | Charlottesville Rust Meetup
• January 13, 2022 | Minneapolis, MN, US | Safe Systems Programming in Rust: The Promise and the Challenge | Software Engineering Reading Group
• January 13, 2022 | San Diego, CA, US | San Diego Rust Rust January 2022 Tele-Meetup | San Diego Rust
• January 13, 2022 | Warsaw, PL | Rust Warsaw #4 | Rust Warsaw
• January 18, 2022 | Washington, DC, US| Mid-month Rustful | Rust DC
• January 19, 2022 | Vancouver, BC, CA | Rust Study/Hack/Hang-out night | Vancouver Rust
• January 25, 2022 | Dallas, TX, US | Last Tuesday Meetup | Dallas Rust
• January 27, 2022 | Stuttgart, DE | Rust-Meetup | Rust Community Stuttgart
• February 1, 2022 | Buffalo, NY, US | First Tuesdays: Buffalo Rust User Group | Buffalo Rust Meetup

North America

• January 6, 2022 | Austin, TX, US | Rust Lunch | Rust ATX
• January 12, 2022 | Atlanta, GA, US | Grab a beer with fellow Rustaceans | Rust Atlanta
• January 13, 2022 | Columbus, OH, US | Monthly Meeting | Columbus Rust Society

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.

Rust Jobs

Dreamsolution

• Rust Developer (Delft, NL)

Dusk

• Rust Developer (Remote)

Ockam

• Multiple Rust Development Positions Available (Remote)

Estuary

• Multiple Rust Development Positions Available (Remote, New York, NY, US, or Columbus, OH, US

Kraken

• Backend Engineer - Rust - Core Backend (Remote)
• Backend Engineer, Kraken Futures - Rust (Remote)
• Senior Rust Engineer - Banking (Remote)

Tweet us at @ThisWeekInRust to get your job offers listed here!

Quote of the Week

I performed an extremely scientific poll on twitter, and determined this is not how it's pronounced

---

Well, it really is Vec<T, A>, pronounced Veck-tah. 😛

---

Look, I moved away from Boston to avoid this sort of thing 😄.

– the8472 & Thom Chiovoloni on github

Thanks to Josh Triplett for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, andrewpollack, U007D, kolharsam, joelmarcey, mariannegoldin.

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust