--- title: Ruff v0.0.281 | daily.dev description: Ruff v0.0.281 ships with a 2-3x faster lexer achieved through cache-friendly data structures, fewer allocations, and ASCII optimizations. The release adds... canonical: https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Ruff v0.0.281 | daily.dev og:description: Ruff v0.0.281 ships with a 2-3x faster lexer achieved through cache-friendly data structures, fewer allocations, and ASCII optimizations. The release adds... og:url: https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y og:image: https://api.daily.dev/og/posts/tffkpQW0Y.png og:image:alt: Ruff v0.0.281 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Ruff v0.0.281 **[Astral](https://daily.dev/sources/astral-sh)** · 7 min read · 2 upvotes · 0 comments ## Summary Ruff v0.0.281 ships with a 2-3x faster lexer achieved through cache-friendly data structures, fewer allocations, and ASCII optimizations. The release adds eight new lint rules: four for type stubs (unused private TypeVar, Protocol, TypeAlias, TypedDict), one for unsupported method calls on __all__, self-assigning variable detection, unsafe subprocess.Popen preexec_fn usage, and pathlib-based replacements for os.sep.split and glob. End-of-line file-level noqa suppression comments are now warned about and ignored. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Ruff v0.16.0](https://daily.dev/posts/ruff-v0-16-0-by368rknj) · Astral · 23 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#rust](https://daily.dev/tags/rust) [View this post on daily.dev](https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Ruff v0.0.281","url":"https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y"},"datePublished":"2026-03-31T12:27:09.776Z","dateModified":"2026-03-31T12:32:07.783Z","description":"Ruff v0.0.281 ships with a 2-3x faster lexer achieved through cache-friendly data structures, fewer allocations, and ASCII optimizations. The release adds...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/2964e4252a602880adc69ff495d77117?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/2964e4252a602880adc69ff495d77117?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Astral","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Astral","logo":"https://media.daily.dev/image/upload/s--NI5d91BK--/f_auto,q_auto/v1774959974/logos/astral-sh?_a=BAMAMiWQ0","url":"https://daily.dev/sources/astral-sh"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/ruff-v0-0-281-tffkpqw0y","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,rust","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Astral","item":"https://daily.dev/sources/astral-sh"},{"@type":"ListItem","position":3,"name":"Ruff v0.0.281"}]} ```