restrict в C: оптимизация на честном слове

Привет, Хабр! Сегодня поговорим про один из самых незаметных, но любопытных моментов языка C. Если вы пишете на C, скорее всего вы никогда не использовали ключевое слово restrict . А зря — этот квалификатор указателя может дать вашему коду неплохой прирост производительности. Правда, для этого придётся дать компилятору честное слово насчёт своих указателей.

https://habr.com/ru/companies/otus/articles/978524/

#C #указатели #память #aliasing #оптимизация_кода #lowlevel_программирование #компилятор

🤔 Ah yes, the thrilling world of #aliasing, where optimizations go to die, and compilers throw in the towel faster than you can say "Advent of Giving Up." 🎄 Matt's #blog, expertly proofread by an #LLM, offers the riveting insight that *knowing why* your #compiler is a quitter is just as important as actual #optimization, because who doesn't love a good excuse? 😂
https://xania.org/202512/15-aliasing-in-general #insights #AdventOfGivingUp #HackerNews #ngated

Aliasing

https://xania.org/202512/15-aliasing-in-general

#HackerNews #Aliasing #AliasingInGeneral #HackerNews #TechDiscussion #Programming

And so, here are four functions to demonstrate it. The default resolution of the plotting routine is crude, leading to #Aliasing and so the mesh has to be refined somewhat.

Here are three #ConicSections and one #Trigonometric functions.

An #Ellipse
A #Parabola.
A #Hyperbola.
A rotating #Tangent function.

#MyWork #CCBYSA #Maxima #Mathematics #Geometry #FreeSoftware

@wonderofscience What a great example of #aliasing.

https://youtu.be/8_bkBL8e40Q

Datamoshing identity.
identità immaterialità
Corpo, algoritmo: manipolazione
delle informazioni video.
Frames e video, 2025.

Per il video, gli scatti e i testi,
www.roccioletti.com

#datamoshing #aliasing #glitch #blurring #lowres #moiré #pixellation #flickering #simulacra #identity #body #corpo #contemporaryart #artecontemporanea #performanceart #performingart #art #arte #artiperformative #videoart #videoarte #postfotografia #postphotography

👁️ AAA - Analytical Anti-Aliasing
by FrostKiwi @FrostKiwi

#Aliasing #WebGL #webdev #games

https://blog.frost.kiwi/analytical-anti-aliasing/

Here be dragons 😰:

“The Strict Aliasing Situation Is Pretty Bad” [2016], John Regehr (https://blog.regehr.org/archives/1307).

On HN: https://news.ycombinator.com/item?id=41757701 and https://news.ycombinator.com/item?id=11288665

#Programming #C #CPlusPlus #Optimization #Aliasing #StrictAliasing #Compilers

“Visions Of The Future: Formal Verification In Rust”, Xavier Denis (https://xav.io/blog/rust-formal-verification/).

On Lobsters: https://lobste.rs/s/fekcju/visions_future_formal_verification_rust

#Rust #FormalVerification #HoareLogic #SeparationLogic #Correctness #Proof #Assertions #References #Aliasing

Intriguing, but a little extreme IMO:

“References Are Like Jumps”, Saoirse Shipwreckt (https://without.boats/blog/references-are-like-jumps/).

On HN: https://news.ycombinator.com/item?id=40349124

On Lobsters: https://lobste.rs/s/eslpei/references_are_like_jumps

#Programming #Rust #Mojo #Hylo #PLDI #ProgrammingLanguages #References #Aliasing

If it's a rendering artefact that you never see throughout the huge range of styles represented by offline rendered CG but you see (or saw) it all the time in real-time rendering, what you're pointing at is a defect (due to the lack of time for completing a frame), not an artistic style/movement. #aliasing #JustSayNo

#Art #DigitalArt #Sword #Aliasing

I’ve done a couple of #AnimatedGifs of #sunsets before and the conditions seemed right today. The program I used was the #Unix commands #convert and #gifsicle to reduce the image size which produces no #aliasing artefacts that you can get with something like #Gimp. Still, you can see how the #Sun sets at an oblique angle at this #latitude.

#MyWork #MyPhoto #CCBYSA #DSLR #Nikon #D7000 #Spring

It's a trap. Don't let #aliasing deceive you. You are heading the wrong way. And no, the hyperlink was not a #honeypot.

#aliasing

🌈 The Secret Passage 🦄

#OnThisDay #aliasing
1946: The Constitution of Japan is adopted through Emperor's assent.

Considering that I was flying a "Hayabusa" today, it's a good sign.

🖖

#aliasing -> #antialiasing

Here is my Hayabusa. Like a glove! :scremcat:

#aliasing
Wish U a happy crash landing.

#aliasing #spy #sunset

Well, I've updated HALL today. Not sure if I should link it or not. But I'll say this much, it's been fun working on it, even if it was a pain to get that paper-thing style working.

This character is Konoe, she's a character from HALL.

#poodle #spikedcollar #aliasing #art

https://mastodon.art/media/AHeHIHIzJOS-DJrav_8