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<copyright>Alisa Sireneva, CC BY</copyright>
<managingEditor>[email protected] (Alisa Sireneva)</managingEditor>
<webMaster>[email protected] (Alisa Sireneva)</webMaster>
<lastBuildDate>Wed, 06 Nov 2024 14:46:34 GMT</lastBuildDate>
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<item>
<title>The Rust Trademark Policy is still harmful</title>
<link>https://purplesyringa.moe/blog/./the-rust-trademark-policy-is-still-harmful/</link>
<description>4 days ago, the Rust Foundation has released a new draft of the Rust Language Trademark Policy. The previous draft led to division among the community several years ago, so it was retracted to hopefully make a new, milder draft.
Well, that failed. While certain problems were resolved (thank you, we appreciate it!), the new version is still exceedingly limiting and, in my opinion, will harm both the Rust community as a whole and compiler and crate developers. While I expect the more limiting rules to not be applied in practice, I don’t want to feel like I’m at a gunpoint while working on the Rust ecosystem, and this is exactly what it’ll feel like if this draft is finalized.
Below are some of my core objections to the draft.</description>
<author>[email protected] (Alisa Sireneva)</author>

<guid>https://purplesyringa.moe/blog/./the-rust-trademark-policy-is-still-harmful/</guid>
<pubDate>Sun, 10 Nov 2024 00:00:00 GMT</pubDate>
</item>

<item>
<title>Bringing faster exceptions to Rust</title>
<link>https://purplesyringa.moe/blog/./bringing-faster-exceptions-to-rust/</link>
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<!doctypehtml><meta charset=utf-8><meta content=width=device-width,initial-scale=1 name=viewport><title>purplesyringa's blog</title><link href=../all.css rel=stylesheet><link href=../blog.css rel=stylesheet><link href=../vendor/Temml-Local.css rel=stylesheet><link crossorigin href=https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,100..900;1,100..900&family=Roboto+Mono:ital,wght@0,100..700;1,100..700&family=Roboto:ital,wght@0,400;0,700;1,400;1,700&family=Slabo+27px&display=swap rel=stylesheet><link href=../fonts/webfont.css rel=stylesheet><link media="screen and (prefers-color-scheme: dark"href=../vendor/atom-one-dark.min.css rel=stylesheet><link media="screen and (prefers-color-scheme: light"href=../vendor/a11y-light.min.css rel=stylesheet><link title="Blog posts"href=/blog/feed.rss rel=alternate type=application/rss+xml><script data-website-id=0da1961d-43f2-45cc-a8e2-75679eefbb69 defer src=https://zond.tei.su/script.js></script><body><header><div class=viewport-container><div class=media><a href=https://github.com/purplesyringa><img alt=GitHub src=../images/github-mark-white.svg></a></div><h1><a href=/>purplesyringa</a></h1><nav><a href=..>about</a><a class=current href>blog</a><a href=../sink/>kitchen sink</a></nav></div></header><section><div class=viewport-container><p><a href=/blog/feed.rss><i class="nf nf-fa-rss_square"title=RSS></i> Subscribe to RSS</a><div class=post-entry><h2><a href=./bringing-faster-exceptions-to-rust/>Bringing faster exceptions to Rust</a></h2><time>November 6, 2024</time><a class=discussion href=https://www.reddit.com/r/rust/comments/1gl050z/bringing_faster_exceptions_to_rust/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><p>Three months ago, I wrote about why <a href=../you-might-want-to-use-panics-for-error-handling/>you might want to use panics for error handling</a>. Even though it’s a catchy title, panics are hardly suited for this goal, even if you try to hack around with macros and libraries. The real star is <em>the unwinding mechanism</em>, which powers panics. This post is the first in a series exploring what unwinding is, how to speed it up, and how it can benefit Rust and C++ programmers.<p><a href=./bringing-faster-exceptions-to-rust/>Keep reading</a></div><div class=post-entry><h2><a href=./we-built-the-best-bad-apple-in-minecraft/>We built the best "Bad Apple!!" in Minecraft</a></h2><time>October 10, 2024</time><a class=discussion href=https://news.ycombinator.com/item?id=41798369><i class="nf nf-md-comment"title=Comment></i> Hacker News</a><p>Demoscene is the art of pushing computers to perform tasks they weren’t designed to handle. One recurring theme in demoscene is the shadow-art animation “Bad Apple!!”. We’ve played it on the Commodore 64, <a href=https://en.wikipedia.org/wiki/Vectrex>Vectrex</a> (a unique game console utilizing only vector graphics), <a href=https://www.youtube.com/watch?v=SDvk3aL78fI>Impulse Tracker</a>, and even <a href=https://tasvideos.org/6012M>exploited Super Mario Bros.</a> to play it.<p>But how about Bad Apple!!.. in Minecraft?<p><a href=./we-built-the-best-bad-apple-in-minecraft/>Keep reading</a></div><div class=post-entry><h2><a href=ru/minecraft-compares-arrays-in-cubic-time/>Minecraft сравнивает массивы за куб</a></h2><time>September 14, 2024</time><a class=discussion href=https://t.me/alisa_rummages/156><i class="nf nf-md-comment"title=Comment></i> Telegram</a><p>Коллизии в играх обнаруживаются тяжелыми алгоритмами. Для примера попробуйте представить себе, насколько сложно это для просто двух произвольно повернутых кубов в пространстве. Они могут контактировать двумя ребрами, вершиной и гранью или еще как-то более сложно.<p>В майнкрафте вся геометрия хитбоксов параллельна осям координат, т.е. наклона не бывает. Это сильно упрощает поиск коллизий.<p>Я бы такое писала просто. Раз хитбокс блока — это объединение нескольких параллелепипедов, то можно его так и хранить: как список 6-элементных тьюплов. В подавляющем большинстве случаев этот список будет очень коротким. Для обычных кубов его длина — 1, для стеклопаналей может достигать 2, наковальня, о боги, состоит из 3 элементов, а стены могут иметь их аж целых 4. Для проверки хитбоксов на пересечение достаточно перебрать пары параллелепипедов двух хитбоксов (кажется, их может быть максимум 16). Для параллелепипедов с параллельными осями задача решается тривиально.<p>Но Minecraft JE писала не я, поэтому там реализация иная.<p><a href=ru/minecraft-compares-arrays-in-cubic-time/>Keep reading</a></div><div class=post-entry><h2><a href=./webp-the-webpage-compression-format/>WebP: The WebPage compression format</a></h2><time>September 7, 2024</time><a class=discussion href=https://news.ycombinator.com/item?id=41475124><i class="nf nf-md-comment"title=Comment></i> Hacker News</a><a class=discussion href=https://www.reddit.com/r/programming/comments/1fb5pzh/webp_the_webpage_compression_format/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><a class=discussion href=https://lobste.rs/s/t81n2g/webp_webpage_compression_format><i class="nf nf-md-comment"title=Comment></i> Lobsters</a><a class=discussion href=https://habr.com/ru/articles/841754/><i class="nf nf-md-translate"title=Translation></i> Russian</a><p>I want to provide a smooth experience to my site visitors, so I work on accessibility and ensure it works without JavaScript enabled. I care about page load time because some pages contain large illustrations, so I minify my HTML.<p>But one <em>thing</em> makes turning my blog light as a feather a pain in the ass.<p><a href=./webp-the-webpage-compression-format/>Keep reading</a></div><div class=post-entry><h2><a href=./division-is-hard-but-it-does-not-have-to-be/>Division is hard, but it doesn't have to be</a></h2><time>August 24, 2024</time><a class=discussion href=https://www.reddit.com/r/programming/comments/1f0n8sk/division_is_hard_but_it_doesnt_have_to_be/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><p>Developers don’t usually divide numbers all the time, but hashmaps often need to compute <a href=https://en.wikipedia.org/wiki/Remainder>remainders</a> modulo a prime. Hashmaps are really common, so fast division is useful.<p>For instance, rolling hashes might compute <code>u128 % u64</code> with a fixed divisor. Compilers just drop the ball here:<pre><code class=language-rust><span class=hljs-keyword>fn</span> <span class="hljs-title function_">modulo</span>(n: <span class=hljs-type>u128</span>) <span class=hljs-punctuation>-></span> <span class=hljs-type>u64</span> {
<!doctypehtml><meta charset=utf-8><meta content=width=device-width,initial-scale=1 name=viewport><title>purplesyringa's blog</title><link href="{{ root }}/favicon.ico?v=2"rel=icon><link href=../all.css rel=stylesheet><link href=../blog.css rel=stylesheet><link href=../vendor/Temml-Local.css rel=stylesheet><link crossorigin href=https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,100..900;1,100..900&family=Roboto+Mono:ital,wght@0,100..700;1,100..700&family=Roboto:ital,wght@0,400;0,700;1,400;1,700&family=Slabo+27px&display=swap rel=stylesheet><link href=../fonts/webfont.css rel=stylesheet><link media="screen and (prefers-color-scheme: dark"href=../vendor/atom-one-dark.min.css rel=stylesheet><link media="screen and (prefers-color-scheme: light"href=../vendor/a11y-light.min.css rel=stylesheet><link title="Blog posts"href=/blog/feed.rss rel=alternate type=application/rss+xml><script data-website-id=0da1961d-43f2-45cc-a8e2-75679eefbb69 defer src=https://zond.tei.su/script.js></script><body><header><div class=viewport-container><div class=media><a href=https://github.com/purplesyringa><img alt=GitHub src=../images/github-mark-white.svg></a></div><h1><a href=/>purplesyringa</a></h1><nav><a href=..>about</a><a class=current href>blog</a><a href=../sink/>kitchen sink</a></nav></div></header><section><div class=viewport-container><p><a href=/blog/feed.rss><i class="nf nf-fa-rss_square"title=RSS></i> Subscribe to RSS</a><div class=post-entry><h2><a href=./the-rust-trademark-policy-is-still-harmful/>The Rust Trademark Policy is still harmful</a></h2><time>November 10, 2024</time><p>4 days ago, the Rust Foundation has <a href=https://blog.rust-lang.org/2024/11/06/trademark-update.html>released</a> a new <a href=https://drive.google.com/file/d/1hjTx11Fb-4W7RQLmp3R8BLDACc7zxIpG/view>draft</a> of the Rust Language Trademark Policy. The previous draft led to division among the community several years ago, so it was retracted to hopefully make a new, milder draft. Well, that failed. While certain problems were resolved (thank you, we appreciate it!), the new version is still exceedingly limiting and, in my opinion, will harm both the Rust community as a whole <em>and</em> compiler and crate developers. While I expect the more limiting rules to not be applied in practice, I don’t want to feel like I’m at a gunpoint while working on the Rust ecosystem, and this is exactly what it’ll feel like if this draft is finalized. Below are some of my core objections to the draft.<p><a href=./the-rust-trademark-policy-is-still-harmful/>Keep reading</a></div><div class=post-entry><h2><a href=./bringing-faster-exceptions-to-rust/>Bringing faster exceptions to Rust</a></h2><time>November 6, 2024</time><a class=discussion href=https://www.reddit.com/r/rust/comments/1gl050z/bringing_faster_exceptions_to_rust/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><p>Three months ago, I wrote about why <a href=../you-might-want-to-use-panics-for-error-handling/>you might want to use panics for error handling</a>. Even though it’s a catchy title, panics are hardly suited for this goal, even if you try to hack around with macros and libraries. The real star is <em>the unwinding mechanism</em>, which powers panics. This post is the first in a series exploring what unwinding is, how to speed it up, and how it can benefit Rust and C++ programmers.<p><a href=./bringing-faster-exceptions-to-rust/>Keep reading</a></div><div class=post-entry><h2><a href=./we-built-the-best-bad-apple-in-minecraft/>We built the best "Bad Apple!!" in Minecraft</a></h2><time>October 10, 2024</time><a class=discussion href=https://news.ycombinator.com/item?id=41798369><i class="nf nf-md-comment"title=Comment></i> Hacker News</a><p>Demoscene is the art of pushing computers to perform tasks they weren’t designed to handle. One recurring theme in demoscene is the shadow-art animation “Bad Apple!!”. We’ve played it on the Commodore 64, <a href=https://en.wikipedia.org/wiki/Vectrex>Vectrex</a> (a unique game console utilizing only vector graphics), <a href=https://www.youtube.com/watch?v=SDvk3aL78fI>Impulse Tracker</a>, and even <a href=https://tasvideos.org/6012M>exploited Super Mario Bros.</a> to play it.<p>But how about Bad Apple!!.. in Minecraft?<p><a href=./we-built-the-best-bad-apple-in-minecraft/>Keep reading</a></div><div class=post-entry><h2><a href=ru/minecraft-compares-arrays-in-cubic-time/>Minecraft сравнивает массивы за куб</a></h2><time>September 14, 2024</time><a class=discussion href=https://t.me/alisa_rummages/156><i class="nf nf-md-comment"title=Comment></i> Telegram</a><p>Коллизии в играх обнаруживаются тяжелыми алгоритмами. Для примера попробуйте представить себе, насколько сложно это для просто двух произвольно повернутых кубов в пространстве. Они могут контактировать двумя ребрами, вершиной и гранью или еще как-то более сложно.<p>В майнкрафте вся геометрия хитбоксов параллельна осям координат, т.е. наклона не бывает. Это сильно упрощает поиск коллизий.<p>Я бы такое писала просто. Раз хитбокс блока — это объединение нескольких параллелепипедов, то можно его так и хранить: как список 6-элементных тьюплов. В подавляющем большинстве случаев этот список будет очень коротким. Для обычных кубов его длина — 1, для стеклопаналей может достигать 2, наковальня, о боги, состоит из 3 элементов, а стены могут иметь их аж целых 4. Для проверки хитбоксов на пересечение достаточно перебрать пары параллелепипедов двух хитбоксов (кажется, их может быть максимум 16). Для параллелепипедов с параллельными осями задача решается тривиально.<p>Но Minecraft JE писала не я, поэтому там реализация иная.<p><a href=ru/minecraft-compares-arrays-in-cubic-time/>Keep reading</a></div><div class=post-entry><h2><a href=./webp-the-webpage-compression-format/>WebP: The WebPage compression format</a></h2><time>September 7, 2024</time><a class=discussion href=https://news.ycombinator.com/item?id=41475124><i class="nf nf-md-comment"title=Comment></i> Hacker News</a><a class=discussion href=https://www.reddit.com/r/programming/comments/1fb5pzh/webp_the_webpage_compression_format/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><a class=discussion href=https://lobste.rs/s/t81n2g/webp_webpage_compression_format><i class="nf nf-md-comment"title=Comment></i> Lobsters</a><a class=discussion href=https://habr.com/ru/articles/841754/><i class="nf nf-md-translate"title=Translation></i> Russian</a><p>I want to provide a smooth experience to my site visitors, so I work on accessibility and ensure it works without JavaScript enabled. I care about page load time because some pages contain large illustrations, so I minify my HTML.<p>But one <em>thing</em> makes turning my blog light as a feather a pain in the ass.<p><a href=./webp-the-webpage-compression-format/>Keep reading</a></div><div class=post-entry><h2><a href=./division-is-hard-but-it-does-not-have-to-be/>Division is hard, but it doesn't have to be</a></h2><time>August 24, 2024</time><a class=discussion href=https://www.reddit.com/r/programming/comments/1f0n8sk/division_is_hard_but_it_doesnt_have_to_be/><i class="nf nf-md-comment"title=Comment></i> Reddit</a><p>Developers don’t usually divide numbers all the time, but hashmaps often need to compute <a href=https://en.wikipedia.org/wiki/Remainder>remainders</a> modulo a prime. Hashmaps are really common, so fast division is useful.<p>For instance, rolling hashes might compute <code>u128 % u64</code> with a fixed divisor. Compilers just drop the ball here:<pre><code class=language-rust><span class=hljs-keyword>fn</span> <span class="hljs-title function_">modulo</span>(n: <span class=hljs-type>u128</span>) <span class=hljs-punctuation>-></span> <span class=hljs-type>u64</span> {
(n % <span class=hljs-number>0xffffffffffffffc5</span>) <span class=hljs-keyword>as</span> <span class=hljs-type>u64</span>
}
</code></pre><pre><code class=language-x86asm><span class=hljs-symbol>modulo:</span>
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