--- title: Inside Python 3.15's JIT Optimizer - Ken Jin | daily.dev description: [EuroPython 2026 - S1 on 2026-07-15] 🎤 *Inside Python 3.15's JIT Optimizer by Ken Jin* 🔗... canonical: https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Inside Python 3.15's JIT Optimizer - Ken Jin | daily.dev og:description: [EuroPython 2026 - S1 on 2026-07-15] 🎤 *Inside Python 3.15's JIT Optimizer by Ken Jin* 🔗... og:url: https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq og:image: https://api.daily.dev/og/posts/W6kVSqOwQ.png og:image:alt: Inside Python 3.15's JIT Optimizer - Ken Jin 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. # Inside Python 3.15's JIT Optimizer - Ken Jin **[EuroPython Conference](https://daily.dev/sources/europython)** · 28 min read · 0 upvotes · 0 comments ## Summary [EuroPython 2026 - S1 on 2026-07-15] 🎤 *Inside Python 3.15's JIT Optimizer by Ken Jin* 🔗 https://ep2026.europython.eu/session/inside-python-3-15-s-jit-optimizer 📝 Abstract: Python 3.15's JIT is finally starting to see real speedups on benchmarks. Core to that is a revamped JIT optimizer. *What* the JIT selects to compile and *how* it optimizes code has seen significant improvements thanks to the work of many contributors. In this talk, I will cover in-depth how the Python JIT optimizes your Python code, and how this was an amazing community team effort spanning multiple continents. --- This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License: https://creativecommons.org/licenses/by-nc-sa/4.0/ ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#python](https://daily.dev/tags/python), [#conference](https://daily.dev/tags/conference) [View this post on daily.dev](https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq) ```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":"Inside Python 3.15's JIT Optimizer - Ken Jin","url":"https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq"},"datePublished":"2026-08-19T10:14:18.227Z","dateModified":"2026-08-19T12:01:53.430Z","description":"[EuroPython 2026 - S1 on 2026-07-15]\n🎤 *Inside Python 3.15's JIT Optimizer by Ken Jin* \n🔗...","image":"https://i.ytimg.com/vi/NN_kHSIw0SY/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/NN_kHSIw0SY/sddefault.jpg","isAccessibleForFree":true,"articleSection":"EuroPython Conference","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":"EuroPython Conference","logo":"https://media.daily.dev/image/upload/s--qu8RO-lH--/f_auto,q_auto/v1777800764/logos/europython?_a=BAMAMiWQ0","url":"https://daily.dev/sources/europython"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/inside-python-3-15-s-jit-optimizer---ken-jin-w6kvsqowq","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"python,conference","timeRequired":"PT28M","video":{"@type":"VideoObject","name":"Inside Python 3.15's JIT Optimizer - Ken Jin","description":"[EuroPython 2026 - S1 on 2026-07-15]\n🎤 *Inside Python 3.15's JIT Optimizer by Ken Jin* \n🔗...","thumbnailUrl":"https://i.ytimg.com/vi/NN_kHSIw0SY/sddefault.jpg","uploadDate":"2026-08-19T10:14:18.227Z","duration":"PT28M","url":"https://api.daily.dev/r/W6kVSqOwQ","embedUrl":"https://www.youtube.com/embed/NN_kHSIw0SY"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"EuroPython Conference","item":"https://daily.dev/sources/europython"},{"@type":"ListItem","position":3,"name":"Inside Python 3.15's JIT Optimizer - Ken Jin"}]} ```