--- title: Bun v1.3.7 | daily.dev description: Bun v1.3.7 fixes 91 issues and delivers major performance improvements: 50% faster Buffer.from(array), 35% faster async/await, 3x faster array.flat(), and 90%... canonical: https://daily.dev/posts/bun-v1-3-7-0otwuahrf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Bun v1.3.7 | daily.dev og:description: Bun v1.3.7 fixes 91 issues and delivers major performance improvements: 50% faster Buffer.from(array), 35% faster async/await, 3x faster array.flat(), and 90%... og:url: https://daily.dev/posts/bun-v1-3-7-0otwuahrf og:image: https://api.daily.dev/og/posts/0otwUAHRF.png og:image:alt: Bun v1.3.7 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. # Bun v1.3.7 **[Bun](https://daily.dev/sources/bun)** · 23 min read · 15 upvotes · 1 comments ## Summary Bun v1.3.7 fixes 91 issues and delivers major performance improvements: 50% faster Buffer.from(array), 35% faster async/await, 3x faster array.flat(), and 90% faster padStart/padEnd through a JavaScriptCore upgrade. New features include native JSON5 and JSONL parsers, Bun.wrapAnsi() (33-88x faster than wrap-ansi npm), heap and CPU profiling with markdown output, node:inspector Profiler API, and replMode for Bun.Transpiler. Fetch now preserves header casing, HTTP/2 compatibility is improved for AWS ALB/gRPC/Fauna, and numerous bugs are fixed across bundler, install, test, serve, shell, Node.js APIs, and Windows support. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@yaireo** · 0 upvotes > This is old news. `v1.3.8` already shipped... ## Similar posts on daily.dev - [Bun v1.3.6](https://daily.dev/posts/bun-v1-3-6-wx4br4zyw) · Bun · 94 upvotes · 1 comments - [Bun v1.3.1](https://daily.dev/posts/bun-v1-3-1-6ud9r04nj) · Bun · 51 upvotes · 2 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#performance](https://daily.dev/tags/performance), [#nodejs](https://daily.dev/tags/nodejs), [#bun](https://daily.dev/tags/bun) [View this post on daily.dev](https://daily.dev/posts/bun-v1-3-7-0otwuahrf) ```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":"Bun v1.3.7","url":"https://daily.dev/posts/bun-v1-3-7-0otwuahrf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/bun-v1-3-7-0otwuahrf"},"datePublished":"2026-01-27T07:08:33.285Z","dateModified":"2026-08-24T06:56:18.878Z","description":"Bun v1.3.7 fixes 91 issues and delivers major performance improvements: 50% faster Buffer.from(array), 35% faster async/await, 3x faster array.flat(), and 90%...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c4b80436725ca09ebf02e91226121723?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c4b80436725ca09ebf02e91226121723?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"Bun","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":"Bun","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/9d715eb44dae4d74a2cebd8871d91a0d","url":"https://daily.dev/sources/bun"},"commentCount":1,"discussionUrl":"https://daily.dev/posts/bun-v1-3-7-0otwuahrf","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":15},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":1}],"keywords":"javascript,performance,nodejs,bun","timeRequired":"PT23M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Bun","item":"https://daily.dev/sources/bun"},{"@type":"ListItem","position":3,"name":"Bun v1.3.7"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/bun-v1-3-7-0otwuahrf","comment":[{"@type":"Comment","text":"This is old news. v1.3.8 already shipped…","datePublished":"2026-01-29T10:43:38.464Z","url":"https://daily.dev/posts/0otwUAHRF#c-iAUTkuzVM","author":{"@type":"Person","name":"Yair Even Or","url":"https://daily.dev/yaireo","image":"https://avatars.githubusercontent.com/u/845031?v=4"}}]} ```