--- title: Python Workers redux: fast cold starts, packages, and a... description: Cloudflare Python Workers now support any Pyodide-compatible package with significantly faster cold starts than competitors. Using memory snapshots and... canonical: https://daily.dev/posts/python-workers-redux-fast-cold-starts-packages-and-a-uv-first-workflow-3o1ezoau3 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Python Workers redux: fast cold starts, packages, and a uv-first workflow | daily.dev og:description: Cloudflare Python Workers now support any Pyodide-compatible package with significantly faster cold starts than competitors. Using memory snapshots and... og:url: https://daily.dev/posts/python-workers-redux-fast-cold-starts-packages-and-a-uv-first-workflow-3o1ezoau3 og:image: https://api.daily.dev/og/posts/3O1EzOau3.png og:image:alt: Python Workers redux: fast cold starts, packages, and a uv-first workflow 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. # Python Workers redux: fast cold starts, packages, and a uv-first workflow **[Cloudflare](https://daily.dev/sources/cloudflare)** · 12 min read · 31 upvotes · 0 comments ## Summary Cloudflare Python Workers now support any Pyodide-compatible package with significantly faster cold starts than competitors. Using memory snapshots and WebAssembly architecture, Workers achieve 2.4x faster cold starts than AWS Lambda and 3x faster than Google Cloud Run when loading common packages. The platform integrates with uv for package management through pywrangler tooling, enabling easy deployment of Python applications globally. Technical innovations include memory snapshot restoration, careful entropy handling for randomness, and function pointer table management to eliminate Python initialization overhead during cold starts. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Python Workers Redux: Wasm Snapshots and Native uv Tooling](https://daily.dev/posts/python-workers-redux-wasm-snapshots-and-native-uv-tooling-pmu15dc6n) · InfoQ · 0 upvotes · 0 comments - [Workers RPC now works across Python and JavaScript](https://daily.dev/posts/workers-rpc-now-works-across-python-and-javascript-2hxsxqvf4) · Cloudflare · 5 upvotes · 0 comments - [How Cloudflare Eliminates Cold Starts for Serverless Workers](https://daily.dev/posts/how-cloudflare-eliminates-cold-starts-for-serverless-workers-cy0axotzo) · ByteByteGo · 2 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#performance](https://daily.dev/tags/performance), [#serverless](https://daily.dev/tags/serverless), [#webassembly](https://daily.dev/tags/webassembly), [#cloudflare](https://daily.dev/tags/cloudflare) [View this post on daily.dev](https://daily.dev/posts/python-workers-redux-fast-cold-starts-packages-and-a-uv-first-workflow-3o1ezoau3) ```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":"Python Workers redux: fast cold starts, packages, and a uv-first workflow","url":"https://daily.dev/posts/python-workers-redux-fast-cold-starts-packages-and-a-uv-first-workflow-3o1ezoau3","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/python-workers-redux-fast-cold-starts-packages-and-a-uv-first-workflow-3o1ezoau3"},"datePublished":"2025-12-08T14:17:57.872Z","dateModified":"2025-12-08T14:18:20.410Z","description":"Cloudflare Python Workers now support any Pyodide-compatible package with significantly faster cold starts than competitors. 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