#AutoVectorization

[this-week-in-rust]

This Week in Rust 595

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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Updates from Rust Community

Official

March Project Goals Update

Newsletters

The Embedded Rustacean Issue #43

Project/Tooling Updates

Shadertoys ported to Rust GPU

Meilisearch 1.14 - composite embedders, embedding cache, granular filterable attributes, and batch document retrieval by ID

rust-query 0.4: structural types and other new features

Observations/Thoughts

Rebuilding Prime Video UI with Rust and WebAssembly

ALP Rust is faster than C++

what if the poison were rust?

A surprising enum size optimization in the Rust compiler

Two Years of Rust

An ECS lite architecture

A 2025 Survey of Rust GUI Libraries

BTrees, Inverted Indices, and a Model for Full Text Search

Cutting Down Rust Compile Times From 30 to 2 Minutes With One Thousand Crates

SIMD in zlib-rs (part 1): Autovectorization and target features

Avoiding memory fragmentation in Rust with jemalloc

[video] Bevy Basics: Who Observes the Observer

Rust Walkthroughs

Rust Type System Deep Dive From GATs to Type Erasure

Async from scratch 1: What's in a Future, anyway? | natkr's ramblings

Async from scratch 2: Wake me maybe | natkr's ramblings

Building a search engine from scratch, in Rust: part 4

Pretty State Machine Patterns in Rust

[video] Build with Naz : Declarative macros in Rust

Miscellaneous

March 2025 Jobs Report

Rust resources

Crate of the Week

This week's crate is wgpu, a cross-platform graphics and compute library based on WebGPU.

Despite a 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.

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, Rust language RFCs or Rustup.*

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

RFCs

Rust

Rustup

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.

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.

rama - add serve command to rama-cli

rama - add support for include_dir for to ServeDir and related

rama - add curl module to rama-http-types

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 X (formerly Twitter) 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.

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 X (formerly Twitter) or Mastodon!

Updates from the Rust Project

480 pull requests were merged in the last week

Compiler

detect and provide suggestion for &raw EXPR

don't suggest the use of impl Trait in closure parameter

make the compiler suggest actual paths instead of visible paths if the visible paths are through any doc hidden path

tell LLVM about impossible niche tags

remove Nonterminal and TokenKind::Interpolated

re-use Sized fast-path

Library

add core::intrinsics::simd::{simd_extract_dyn, simd_insert_dyn}

initial UnsafePinned implementation (Part 1: Libs)

polymorphize array::IntoIter's iterator impl

speed up String::push and String::insert

std: add Output::exit_ok

Cargo

added symlink resolution for workspace-path-hash

improved error message when build-dir template var is invalid

Rustdoc

search: add unbox flag to Result aliases

enable Markdown extensions when looking for doctests

Clippy

arbitrary_source_item_ordering should ignore test modules

implicit_return: better handling of asynchronous code

accept self.cmp(other).into() as canonical PartialOrd impl

add manual_abs_diff lint

consecutive returns dont decrease cognitive Complexity level anymore

consider nested lifetimes in mut_from_ref

correctly handle bracketed type in default_constructed_unit_struct

deprecate match_on_vec_items lint

do not propose to auto-derive Clone in presence of unsafe fields

fix: iter_cloned_collect false positive with custom From/IntoIterator impl

fix: map_entry: don't emit lint before checks have been performed

fix: redundant_clone false positive in overlapping lifetime

various fixes for manual_is_power_of_two

Rust-Analyzer

ast: return correct types for make::expr_* methods

add children modules feature

add normalizeDriveLetter

distribute x64 and aarch64 Linux builds with PGO optimizations

fix dyn compatibility code bypassing callable_item_signature query

fix a small bug with catastrophic effects

fix an incorrect ExpressionStore that was passed

prevent panics when there is a cyclic dependency between closures

shadow type by module

ignore errors from rustfmt which may trigger error notification

port closure inference from rustc

Rust Compiler Performance Triage

Relatively small changes this week, nothing terribly impactful (positive or negative).

Triage done by @simulacrum. Revision range: e643f59f..15f58c46

1 Regressions, 3 Improvements, 3 Mixed; 2 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

Split elided_lifetime_in_paths into tied and untied

check types of const param defaults

Stabilize flags for doctest cross compilation

Do not remove trivial SwitchInt in analysis MIR

Implement a lint for implicit autoref of raw pointer dereference - take 2

Implement Default for raw pointers

make abi_unsupported_vector_types a hard error

Stabilize let chains in the 2024 edition

Make closure capturing have consistent and correct behaviour around patterns

Stabilize the cell_update feature

Other Areas

*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.

New and Updated RFCs

No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2025-04-16 - 2025-05-14 🦀

Virtual

2025-04-16 | Virtual (Vancouver, BC, CA) | Vancouver Rust

Rust Study/Hack/Hang-out

2025-04-17 | Virtual and In-Person (Redmond, WA, US) | Seattle Rust User Group

April, 2025 SRUG (Seattle Rust User Group) Meetup

2025-04-22 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup

Fourth Tuesday

2025-04-23 | Virtual (Cardiff, UK) | Rust and C++ Cardiff

Beyond embedded - OS development in Rust

2025-04-24 | Virtual (Berlin, DE) | Rust Berlin

Rust Hack and Learn

2025-04-24 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup

Part 2: Quantum Computers Can’t Rust-Proof This!"

2025-05-03 | Virtual (Kampala, UG) | Rust Circle Meetup

Rust Circle Meetup

2025-05-05 | Virtual (Tel Aviv-Yafo, IL) | Rust 🦀 TLV

Tauri: Cross-Platform desktop applications with Rust and web technologies

2025-05-07 | Virtual (Indianapolis, IN, US) | Indy Rust

Indy.rs - with Social Distancing

2025-05-08 | Virtual (Berlin, DE) | Rust Berlin

Rust Hack and Learn

2025-05-13 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup

Second Tuesday

Asia

2025-04-22 | Tel Aviv-Yafo, IL | Rust 🦀 TLV

In person Rust April 2025 at Braavos in Tel Aviv in collaboration with StarkWare

Europe

2025-04-19 | Istanbul, TR | Türkiye Rust Community

Rust Konf Türkiye

2025-04-23 | London, UK | London Rust Project Group

Fusing Python with Rust using raw C bindings

2025-04-24 | Aarhus, DK | Rust Aarhus

Talk Night at MFT Energy

2025-04-24 | Edinburgh, UK | Rust and Friends

Rust and Friends (evening pub)

2025-04-24 | Manchester, UK | Rust Manchester

Rust Manchester April Code Night

2025-04-25 | Edinburgh, UK | Rust and Friends

Rust and Friends (daytime coffee)

2025-04-26 | Stockholm, SE | Stockholm Rust

Ferris' Fika Forum #11

2025-04-29 | London, UK | Rust London User Group

LDN Talks April 2025 Community Showcase

2025-04-29 | Paris, FR | Rust Paris

Rust meetup #76

2025-04-30 | Frankfurt, DE | Rust Rhein-Main

Kubernetes Operator in Rust

2025-05-01 | Nürnberg, DE | Rust Nuremberg

Hackers Hike 0x0

2025-05-06 - 2025-05-07 | Paris, FR | WebAssembly and Rust Meetup

GOSIM AI Paris 2025

2025-05-06 | Paris, FR | WebAssembly and Rust Meetup (Wasm Empowering AI)

GOSIM AI Paris 2025 (Discount available)

2025-05-07 | Madrid, ES | MadRust

VII Lenguajes, VII Perspectivas, I Problema

2025-05-07 | Oxford, UK | Oxford Rust Meetup Group

Oxford Rust and C++ social

2025-05-08 | Gdansk, PL | Rust Gdansk

Rust Gdansk Meetup #8

2025-05-08 | London, UK | London Rust Project Group

Adopting Rust (Hosted by Lloyds bank)

2025-05-13 | Amsterdam, NL | RustNL

RustWeek 2025 announcement

2025-05-13 - 2025-05-17 | Utrecht, NL | Rust NL

RustWeek 2025

2025-05-14 | Reading, UK | Reading Rust Workshop

Reading Rust Meetup

North America

2025-04-17 | Mountain View, CA, US | Hacker Dojo

RUST MEETUP at HACKER DOJO

2025-04-17 | Nashville, TN, US | Music City Rust Developers

Using Rust For Web Series 1 : Why HTMX Is Bad

2025-04-17 | Redmond, WA, US | Seattle Rust User Group

April, 2025 SRUG (Seattle Rust User Group) Meetup

2025-04-22 | Detroit, MI, US | Detroit Rust

Rust Community Meet and Conference Report - Ann Arbor

2025-04-23 | Austin, TX, US | Rust ATX

Rust Lunch - Fareground

2025-04-23 | Austin, TX, US | Rust ATX

Rust Lunch - Fareground 2025-04-23 | Spokane, WA, US | Spokane Rust

Community Show & Tell at Fuel Coworking

2025-04-24 | Atlanta, GA, US | Rust Atlanta

3rd 3RD TIME OMG YES!

2025-04-25 | Boston, MA, US | Boston Rust Meetup

Ball Square Rust Lunch, Apr 25

2025-05-01 | Saint Louis, MO, US | STL Rust

SIUE Capstone Project reflections on Rust

2025-05-03 | Boston, MA, US | Boston Rust Meetup

Boston Common Rust Lunch, May 3

2025-05-08 | México City, MX | Rust MX

Calculando con el compilador: Compiler time vs Run time

2025-05-08 | Portland, OR, US | PDXRust

Apache DataFusion: A Fast, Extensible, Modular Analytic Query Engine in Rust

2025-05-11 | Boston, MA, US | Boston Rust Meetup

Porter Square Rust Lunch, May 11

Oceania

2025-04-22 | Barton, AC, AU | Canberra Rust User Group

April 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

IEEE 754 floating point, proudly providing counterexamples since 1985!

– Johannes Dahlström on rust-internals

Thanks to Ralf Jung for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, U007D, joelmarcey, mariannegoldin, bennyvasquez, bdillo

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust

[piratesexmachine420]

Deeply annoying that the default TI-89/92 Plus system timer autovector reads/writes to the bus. If I mask it while reading the keyboard matrix, the loop is too tight and the Automatic Power Down timer doesn't decrement; if I don't mask it, then AFAICT there's a chance it'll majorly corrupt both i68soyuz's state and the AMS' state. It hasn't happened in testing (yet) but I might need to go back to masking it and insert an artificial delay into the main loop. Or maybe move my key matrix reading code into autovector 1. Or maybe it's fine. IDK.

[vitessegraphics-com]

VECTOR TRACING Transform your raster images into stunning vectors with our expert tracing services. Vector Artwork Services at. https://vitessegraphic.com/ Email: info@vitessegraphic.com

[sfigattina]

oddio le determinanti, le matrici, gli autovalori e gli autovettori 😭😭😭

25-29.01.21 // 86-90/100 days of productivity

first week of the semester~ 

[desordenado-ordenado]

La ecuación de Schrödinger.

La ecuación de Schrödinger [ES] es uno de los elementos centrales de la mecánica cuántica; ya que ella revela la evolución de un sistema cuántico en el tiempo, donde toda la información del sistema está contenido en la función de onda psi.

La ES consta de dos partes que llaman nuestra atención a primera vista: El hamiltoniano, H(t), el cual es un operador, en general dependiente del tiempo y el operador diferencial parcial sobre el tiempo del miembro derecho. 

La ES puede separarse en 2 ecuaciones nuevas, una dependiente de las coordenadas espaciales y otra dependiente del tiempo. La solución de la segunda devuelve un operador que conocemos como propagador que, como su nombre sugiere, es el que se encarga de mostrar cómo se traslada nuestro sistema de un estado a otro a lo largo del tiempo. 

Las soluciones a la ecuación de Schrödinger independiente del tiempo (aquella que solo depende de las coordenadas espaciales) devuelve los estados estacionarios del sistema y es fundamentalmente un problema de autovalores. 

Los posibles estados que un sistema cuántico puede tomar con respecto a algún observable no son más que los autovectores del operador correspondiente a dicho observable. Estos autovectores pueden ser degenerados o no. 

En la perspectiva matricial estos estados son autovectores. En la perspectiva funcional los estados se manifiestan en forma de polinomios ortogonales, como los polinomios de Hermite, por ejemplo.

Existen muchas formas de resolver analítica y numéricamente la ES para diversos sistemas; algunas relativamente más complicadas que otras y que ameritan una publicación para cada uno.

[carmecourson]

Principio de Superposición Cuántica

Esta mañana escribía que a veces las dudas son en sí mismas la resolución a su propio contenido.

-Estar en la duda

es tomar la decisión- 

decía Shakespeare en Otelo y citaba Villaver en su libro de la Luna.

El Principio de Superposición en la mecánica cuántica hace referencia a un objeto que posee simultáneamente dos o más valores, a un fotón que toma simultáneamente dos vías para llegar a un mismo punto o un electrón que existe en todos sus estados teóricamente posibles.

La clave de estas situaciones es que la respuesta no es la misma pre- y post- resolución de la duda.

Resolver la duda cambia la naturaleza de la misma, siendo así imposible descubrir el curso real de los acontecimientos si no se hubiese forzado el conocimiento de esa incógnita.

La combinación lineal de los autovectores (cualquier cantidad observable) da lugar a la superposición cuántica de todos los valores de la cantidad.

Si se mide la cantidad, el postulado de proyección establece que el estado colapsa aleatoriamente sobre uno de los valores de la superposición.

Volviendo a nuestro símil, resolver una duda que no está preparada para romper el cascarón implica necesariamente una respuesta aleatoria completamente alejada del curso natural de la vida.

Y es por eso que rindo culto a la ausencia de dogmas.

Y aunque nunca había pensado en esto antes,

es increíble lo que revaloriza a una persona el simple hecho de respetar 

la latencia del resultado.

[munove]

La física de neutrinos revela una propiedad fundamental del álgebra lineal [EN]

Físicos que estudian cómo cambian los neutrinos acaban descubriendo una relación inesperada en álgebra lineal. Se trata de una fórmula que permite calcular los autovectores de una matriz hermítica en función de sus propios autovalores y de los autovalores de las matrices adjuntas. Es una fórmula relativamente sencilla que podría incorporarse incluso a los textos de primer curso de carreras científicas y técnicas. Enlace al artículo científico: arxiv.org/abs/1908.03795

etiquetas: física, matemáticas, álgebra, neutrino, autovalor, autovector

» noticia original (www.quantamagazine.org)

[hackernewsrobot]

Graal Autovectorization

https://github.com/oracle/graal/pull/1692 Comments

[aaronaknightca]

How to Remap any Controller to Keyboard Keys on Windows and MacOS

autovector / Shutterstock (and Microsoft)

Many PC and Mac games treat the keyboard as a first-class citizen and have poor support for game controllers. You can remap your controller buttons to keyboard key presses to get around this limitation.

You’ll lose some analog input—for example, the joysticks will just function as arrow keys that are on or off without the usual range of sensitivity—but for some games, that’s not a huge issue.

If you’re just looking to play Steam games with a controller, Steam already has great built-in tools for remapping controllers in its Big Picture Mode and will be a much easier solution than anything else listed here. For use system-wide or in non-Steam games, you’ll need a third party application.

RELATED: How to Remap Xbox, PlayStation, and Other Controller Buttons in Steam

Connect Your Controller

This step is obvious, but with so many kinds of controllers on the market, it can be a challenge to get them working correctly, especially on macOS. We have a comprehensive guide for most mainstream controllers that you can reference if you’re having issues, but most current-gen controllers will be plug and play on Windows and macOS. Last-gen and earlier controllers may need custom drivers and a bit of setup.

RELATED: How to Connect Any Console Game Controller to a Windows PC or Mac

You can make sure the controller is connected by opening up the “Devices” tab in Window’s settings. Head to Settings > Devices > Bluetooth & Other Devices and look under “Other Devices.”

On macOS, you can usually find USB controllers in the “System Information” app, under “USB.” Bluetooth controllers should show up in the Bluetooth menu in the top menubar.

Read the remaining 14 paragraphs

from https://www.howtogeek.com/404214/how-to-remap-any-controller-to-keyboard-keys-on-windows-and-macos/

[adamgdooley]

How to Remap any Controller to Keyboard Keys on Windows and MacOS

autovector / Shutterstock (and Microsoft)

Many PC and Mac games treat the keyboard as a first-class citizen and have poor support for game controllers. You can remap your controller buttons to keyboard key presses to get around this limitation.

You’ll lose some analog input—for example, the joysticks will just function as arrow keys that are on or off without the usual range of sensitivity—but for some games, that’s not a huge issue.

If you’re just looking to play Steam games with a controller, Steam already has great built-in tools for remapping controllers in its Big Picture Mode and will be a much easier solution than anything else listed here. For use system-wide or in non-Steam games, you’ll need a third party application.

RELATED: How to Remap Xbox, PlayStation, and Other Controller Buttons in Steam

Connect Your Controller

This step is obvious, but with so many kinds of controllers on the market, it can be a challenge to get them working correctly, especially on macOS. We have a comprehensive guide for most mainstream controllers that you can reference if you’re having issues, but most current-gen controllers will be plug and play on Windows and macOS. Last-gen and earlier controllers may need custom drivers and a bit of setup.

RELATED: How to Connect Any Console Game Controller to a Windows PC or Mac

You can make sure the controller is connected by opening up the “Devices” tab in Window’s settings. Head to Settings > Devices > Bluetooth & Other Devices and look under “Other Devices.”

On macOS, you can usually find USB controllers in the “System Information” app, under “USB.” Bluetooth controllers should show up in the Bluetooth menu in the top menubar.

Read the remaining 14 paragraphs

from Computer And Technology https://www.howtogeek.com/404214/how-to-remap-any-controller-to-keyboard-keys-on-windows-and-macos/

[jamestdoleus]

How to Remap any Controller to Keyboard Keys on Windows and MacOS

autovector / Shutterstock (and Microsoft)

Many PC and Mac games treat the keyboard as a first-class citizen and have poor support for game controllers. You can remap your controller buttons to keyboard key presses to get around this limitation.

You’ll lose some analog input—for example, the joysticks will just function as arrow keys that are on or off without the usual range of sensitivity—but for some games, that’s not a huge issue.

If you’re just looking to play Steam games with a controller, Steam already has great built-in tools for remapping controllers in its Big Picture Mode and will be a much easier solution than anything else listed here. For use system-wide or in non-Steam games, you’ll need a third party application.

RELATED: How to Remap Xbox, PlayStation, and Other Controller Buttons in Steam

Connect Your Controller

This step is obvious, but with so many kinds of controllers on the market, it can be a challenge to get them working correctly, especially on macOS. We have a comprehensive guide for most mainstream controllers that you can reference if you’re having issues, but most current-gen controllers will be plug and play on Windows and macOS. Last-gen and earlier controllers may need custom drivers and a bit of setup.

RELATED: How to Connect Any Console Game Controller to a Windows PC or Mac

You can make sure the controller is connected by opening up the “Devices” tab in Window’s settings. Head to Settings > Devices > Bluetooth & Other Devices and look under “Other Devices.”

On macOS, you can usually find USB controllers in the “System Information” app, under “USB.” Bluetooth controllers should show up in the Bluetooth menu in the top menubar.

Read the remaining 14 paragraphs

from James Dole Gadgets News https://www.howtogeek.com/404214/how-to-remap-any-controller-to-keyboard-keys-on-windows-and-macos/

[outsidetheknow]

New top story on Hacker News: Graal Autovectorization

Graal Autovectorization 2 by luu | 0 comments on Hacker News.

[topicprinter]

Article URL: https://github.com/oracle/graal/pull/1692

Comments URL: https://news.ycombinator.com/item?id=21067884

Points: 5

# Comments: 0

[mrfamous001]

Graal Autovectorization 2 by luu | 0 comments on Hacker News.

[aaronaknightca]

How to Remap any Controller to Keyboard Keys on Windows and MacOS

autovector / Shutterstock (and Microsoft)

Many PC and Mac games treat the keyboard as a first-class citizen and have poor support for game controllers. You can remap your controller buttons to keyboard key presses to get around this limitation.

You’ll lose some analog input—for example, the joysticks will just function as arrow keys that are on or off without the usual range of sensitivity—but for some games, that’s not a huge issue.

If you’re just looking to play Steam games with a controller, Steam already has great built-in tools for remapping controllers in its Big Picture Mode and will be a much easier solution than anything else listed here. For use system-wide or in non-Steam games, you’ll need a third party application.

RELATED: How to Remap Xbox, PlayStation, and Other Controller Buttons in Steam

Connect Your Controller

This step is obvious, but with so many kinds of controllers on the market, it can be a challenge to get them working correctly, especially on macOS. We have a comprehensive guide for most mainstream controllers that you can reference if you’re having issues, but most current-gen controllers will be plug and play on Windows and macOS. Last-gen and earlier controllers may need custom drivers and a bit of setup.

RELATED: How to Connect Any Console Game Controller to a Windows PC or Mac

You can make sure the controller is connected by opening up the “Devices” tab in Window’s settings. Head to Settings > Devices > Bluetooth & Other Devices and look under “Other Devices.”

On macOS, you can usually find USB controllers in the “System Information” app, under “USB.” Bluetooth controllers should show up in the Bluetooth menu in the top menubar.

Read the remaining 14 paragraphs

from https://www.howtogeek.com/404214/how-to-remap-any-controller-to-keyboard-keys-on-windows-and-macos/