--- title: How GitHub Handles Millions of Pull Requests Without... description: A walkthrough of the architectural patterns behind GitHub's pull request system, explaining how the platform handles millions of daily operations without... canonical: https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How GitHub Handles Millions of Pull Requests Without Slowing Down | daily.dev og:description: A walkthrough of the architectural patterns behind GitHub's pull request system, explaining how the platform handles millions of daily operations without... og:url: https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87 og:image: https://api.daily.dev/og/posts/1vTElZw87.png og:image:alt: How GitHub Handles Millions of Pull Requests Without Slowing Down 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. # How GitHub Handles Millions of Pull Requests Without Slowing Down **[Medium](https://daily.dev/sources/medium_js)** · 6 min read · 0 upvotes · 0 comments ## Summary A walkthrough of the architectural patterns behind GitHub's pull request system, explaining how the platform handles millions of daily operations without making users wait. The core idea is separating critical work (what must happen before responding) from background work (everything else). Key techniques include fast request acceptance with deferred processing, background job queues processed by parallel workers, event-driven CI triggering, caching of expensive computations, and real-time browser updates via WebSockets or Server-Sent Events. The post generalizes this pattern to other platforms and draws a frontend parallel about progressive data loading. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [GitHub is the wrong shape for this new world](https://daily.dev/posts/github-is-the-wrong-shape-for-this-new-world-sobuyfyho) · Hacker News · 2 upvotes · 2 comments - [The Interview Question That Changed How I Think About System Design](https://daily.dev/posts/the-interview-question-that-changed-how-i-think-about-system-design-4kxeandtd) · Milan Jovanović · 80 upvotes · 2 comments - [How GitHub plans to win developers back](https://daily.dev/posts/how-github-plans-to-win-developers-back-9hvijs2gi) · The New Stack · 1 upvotes · 0 comments - [GitHub adds Stacked PRs to speed complex code reviews](https://daily.dev/posts/github-adds-stacked-prs-to-speed-complex-code-reviews-ufanab95z) · InfoWorld · 0 upvotes · 0 comments --- Tags: [#github](https://daily.dev/tags/github), [#distributed-systems](https://daily.dev/tags/distributed-systems) [View this post on daily.dev](https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87) ```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":"How GitHub Handles Millions of Pull Requests Without Slowing Down","url":"https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87"},"datePublished":"2026-07-22T21:36:34.453Z","dateModified":"2026-09-13T19:53:00.887Z","description":"A walkthrough of the architectural patterns behind GitHub's pull request system, explaining how the platform handles millions of daily operations without...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/aa45ad944a404ae34405fc5ed1335d82?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/aa45ad944a404ae34405fc5ed1335d82?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Medium","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":"Medium","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/medium","url":"https://daily.dev/sources/medium_js"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-github-handles-millions-of-pull-requests-without-slowing-down-1vtelzw87","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"github,distributed-systems","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Medium","item":"https://daily.dev/sources/medium_js"},{"@type":"ListItem","position":3,"name":"How GitHub Handles Millions of Pull Requests Without Slowing Down"}]} ```