--- title: Monzo boosts performance metrics by up to 35% with a... description: Monzo, a UK digital bank with 15 million customers, achieved a 35% reduction in ANR rate and significant scroll performance improvements by fully enabling R8... canonical: https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Monzo boosts performance metrics by up to 35% with a simple R8 update | daily.dev og:description: Monzo, a UK digital bank with 15 million customers, achieved a 35% reduction in ANR rate and significant scroll performance improvements by fully enabling R8... og:url: https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp og:image: https://api.daily.dev/og/posts/WvNwjKzyp.png og:image:alt: Monzo boosts performance metrics by up to 35% with a simple R8 update 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. # Monzo boosts performance metrics by up to 35% with a simple R8 update **[Android Developers Blog](https://daily.dev/sources/androiddev)** · 3 min read · 1 upvotes · 0 comments ## Summary Monzo, a UK digital bank with 15 million customers, achieved a 35% reduction in ANR rate and significant scroll performance improvements by fully enabling R8 optimizations. The key change was replacing the default `proguard-android.txt` config file with `proguard-android-optimize.txt`, removing the `-dontoptimize` instruction. They also implemented Baseline Profiles targeting scroll and rendering on their main feed, resulting in P90 scroll performance improving 71% and P95 by 87%. The post advises teams to audit Keep Rules and automate Baseline Profile generation as part of the release process. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How Reddit used the R8 optimizer for high impact performance improvements](https://daily.dev/posts/how-reddit-used-the-r8-optimizer-for-high-impact-performance-improvements-06qzize75) · Android Developers Blog · 0 upvotes · 0 comments - [Fully Optimized: Wrapping up Performance Spotlight Week](https://daily.dev/posts/fully-optimized-wrapping-up-performance-spotlight-week-h5xryptkz) · Android Developers Blog · 1 upvotes · 0 comments - [Enabling R8 optimization at scale with AI-assisted debugging](https://daily.dev/posts/enabling-r8-optimization-at-scale-with-ai-assisted-debugging-kovtjstfc) · Grab Tech Blog · 0 upvotes · 0 comments --- Tags: [#android](https://daily.dev/tags/android) [View this post on daily.dev](https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp) ```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":"Monzo boosts performance metrics by up to 35% with a simple R8 update","url":"https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp"},"datePublished":"2026-03-30T22:01:18.832Z","dateModified":"2026-03-30T22:01:44.346Z","description":"Monzo, a UK digital bank with 15 million customers, achieved a 35% reduction in ANR rate and significant scroll performance improvements by fully enabling R8...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7115a8b24e756ca76947c76b249849b7?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/7115a8b24e756ca76947c76b249849b7?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Android Developers Blog","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":"Android Developers Blog","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/a3d55bb1d63c48e7bd91b833eb5c2c3c","url":"https://daily.dev/sources/androiddev"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/monzo-boosts-performance-metrics-by-up-to-35-with-a-simple-r8-update-wvnwjkzyp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"android","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Android Developers Blog","item":"https://daily.dev/sources/androiddev"},{"@type":"ListItem","position":3,"name":"Monzo boosts performance metrics by up to 35% with a simple R8 update"}]} ```