{"id":49283,"date":"2024-09-13T07:00:00","date_gmt":"2024-09-13T14:00:00","guid":{"rendered":"https:\/\/dhblog.dream.press\/blog\/?p=49283"},"modified":"2026-07-31T12:31:52","modified_gmt":"2026-07-31T19:31:52","slug":"bun-vs-node","status":"publish","type":"post","link":"https:\/\/www.dreamhost.com\/blog\/bun-vs-node\/","title":{"rendered":"Bun vs. Node: Harder, Better, Faster, Stronger?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The clock strikes 9 AM on a crisp Monday morning. You settle into your favorite chair, ready to start a new web project. You\u2019ve been using Node for most of your projects, but now this \u201cBun\u201d thing has come along.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So you\u2019re sitting there, wondering, \u201cShould I go with my tried-and-trusted Node.js or give Bun a try?\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While this question may seem simple, it will influence your project\u2019s performance and potentially your team\u2019s workflow for months to come.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And you\u2019re not alone in this dilemma.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">But what exactly sets these two apart? How do they compare in terms of features and performance? Most importantly, which one should you choose for your project?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this article, we\u2019ll explore these questions and compare Node.js and Bun across various dimensions. Our goal? To equip you with the knowledge required to make an informed decision that aligns with your project\u2019s needs, team expertise, and long-term objectives.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So here\u2019s the short answer up front.<\/p>\n\n\n\n<h2 id=\"h-bun-vs-node-the-short-answer\" class=\"wp-block-heading\">Bun vs. Node.js: The Short Answer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Choose Bun for faster tooling and strong benchmark results: it led the synthetic CPU and HTTP tests below by 2x\u20134x and builds in a package manager, bundler, test runner, and database clients. Choose Node.js for maximum npm compatibility and established production workflows. For existing projects, migration cost usually decides; for new ones, weigh tooling, compatibility, and workload.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The rest of this article is the evidence. But first, for your article-reading-listening pleasure\u2026<\/p>\n\n\n\n<style>.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }<\/style><div class='embed-container'><iframe data-src='https:\/\/www.youtube.com\/embed\/gAjR4_CbPpQ' frameborder='0' allowfullscreen src='about:blank' class='lazyload' data-load-mode='0'><\/iframe><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Okay, <strong>now<\/strong> we\u2019re ready. Let\u2019s take a look at each runtime briefly.<\/p>\n\n\n\n<h2 id=\"h-what-is-node-js\" class=\"wp-block-heading\">Node.js at a Glance<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"2400\" height=\"1703\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js.webp\" alt=\"screenshot of node.js homepage with header Run JavaScript Everywhere\" class=\"wp-image-49295 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js.webp 2400w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-300x213.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1024x727.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-768x545.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1536x1090.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-2048x1453.webp 2048w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-600x426.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1200x852.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-730x518.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1460x1036.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-784x556.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1568x1113.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-877x622.webp 877w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_node_js-1754x1245.webp 1754w\" data-sizes=\"(max-width: 2400px) 100vw, 2400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 2400px; --smush-placeholder-aspect-ratio: 2400\/1703;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.dreamhost.com\/blog\/what-is-node-js\/\" target=\"_blank\" rel=\"noreferrer noopener\">Node.js<\/a>, first released in 2009 by Ryan Dahl, changed server-side JavaScript.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It allowed developers to use JS outside the browser, opening up new possibilities for building scalable network applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js runs on the <a href=\"https:\/\/nodejs.org\/en\/learn\/getting-started\/the-v8-javascript-engine\" target=\"_blank\" rel=\"noreferrer noopener\">V8 JavaScript Engine<\/a>, the same engine that powers Google Chrome. Its event-driven, non-blocking I\/O model is well-suited for building fast, scalable network applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key features of Node.js include:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A mature package registry, with millions of packages available through npm (Node Package Manager).<\/li>\n\n\n\n<li>Great performance for synchronous tasks.<\/li>\n\n\n\n<li>Strong community support and extensive documentation.<\/li>\n\n\n\n<li>Wide adoption in enterprise environments.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h2_what-is-bun\" class=\"wp-block-heading\">What Is Bun?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"2400\" height=\"1703\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun.webp\" alt=\"screenshot of Bun's homepage with header Bun is a fast JavaScript all-in-one toolkit\" class=\"wp-image-49297 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun.webp 2400w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-300x213.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1024x727.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-768x545.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1536x1090.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-2048x1453.webp 2048w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-600x426.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1200x852.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-730x518.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1460x1036.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-784x556.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1568x1113.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-877x622.webp 877w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_bun-1754x1245.webp 1754w\" data-sizes=\"(max-width: 2400px) 100vw, 2400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 2400px; --smush-placeholder-aspect-ratio: 2400\/1703;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Bun is the younger of the two runtimes, but it\u2019s no longer an unproven one.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">First released in 2022 by Jarred Sumner, Bun shipped a stable 1.0 in September 2023, now runs on the 1.3.x line, and was acquired by Anthropic in December 2025. It positions itself as a drop-in replacement for Node.js, promising faster performance and an improved developer experience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/bun.sh\/docs\" target=\"_blank\" rel=\"noreferrer noopener\">Bun is written in Zig<\/a>, a low-level programming language, though that is changing: per Bun\u2019s July 2026 announcement, v1.3.14 is the last Zig version and v1.4 will be the first written in Rust. It uses the JavaScriptCore engine (the same engine used in Safari) instead of V8. Per Bun\u2019s docs, that low-level implementation and engine choice reduce startup time and memory usage, improving throughput in many workloads. We\u2019ll look at this in a bit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key features of Bun include:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>All-in-one toolkit \u2014 runtime, package manager, bundler, and test runner, plus built-in PostgreSQL, MySQL, SQLite, Redis, and S3 clients added in Bun 1.2 and 1.3.<\/li>\n\n\n\n<li>Native TypeScript support without additional setup.<\/li>\n\n\n\n<li>Faster startup times and improved performance for many operations.<\/li>\n\n\n\n<li>Growing package selection and community.<\/li>\n<\/ul>\n\n\n\n<div class=\"article-newsletter article-newsletter--gradient\">\n\n\n<h2>Get Content Delivered Straight to Your Inbox<\/h2><p>Subscribe now to receive all the latest updates, delivered directly to your inbox.<\/p><form class=\"nwsl-form\" id=\"newsletter_block_\" novalidate><div class=\"messages\"><\/div><div class=\"form-group\"><label for=\"input_newsletter_block_\"><input type=\"email\"name=\"email\"id=\"input_newsletter_block_\"placeholder=\"Enter your email address\"novalidatedisabled=\"disabled\"\/><\/label><button type=\"submit\"class=\"btn btn--brand\"disabled=\"disabled\"><span>Sign Me Up!<\/span><svg width=\"21\" height=\"14\" viewBox=\"0 0 21 14\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<path d=\"M13.8523 0.42524L12.9323 1.34521C12.7095 1.56801 12.7132 1.9304 12.9404 2.14865L16.7241 5.7823H0.5625C0.251859 5.7823 0 6.03416 0 6.3448V7.6573C0 7.96794 0.251859 8.2198 0.5625 8.2198H16.7241L12.9405 11.8535C12.7132 12.0717 12.7095 12.4341 12.9323 12.6569L13.8523 13.5769C14.072 13.7965 14.4281 13.7965 14.6478 13.5769L20.8259 7.39879C21.0456 7.17913 21.0456 6.82298 20.8259 6.60327L14.6477 0.42524C14.4281 0.205584 14.0719 0.205584 13.8523 0.42524Z\" fill=\"white\"\/>\n<\/svg>\n<\/button><\/div><\/form><\/div>\n\n\n<h2 id=\"h2_bun-vs-node-js-performance-comparison\" class=\"wp-block-heading\">Bun vs. Node.js: Performance Comparison<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s dive into the most talked-about aspect when comparing <strong>Bun vs. Node.js: performance<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We\u2019ll walk through benchmark results from development agency <a href=\"https:\/\/5ly.co\/blog\/bun-vs-node-comparison\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fively (5ly.co)<\/a> \u2014 tests run in 2023 on pre-1.0 Bun, in an article last updated December 2025 \u2014 plus newer third-party numbers where the picture has since changed. One framing note before the charts: synthetic benchmarks reward tight loops. In real, database-bound apps, the gap often shrinks to almost nothing, and you\u2019ll see exactly that in the CRUD test below.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. CPU-Intensive Tasks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For CPU-bound operations, Bun shows impressive performance gains over Node.js. This first test involved generating and sorting 100,000 random numbers 10 times consecutively.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These were the results:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1600\" height=\"1323\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks.webp\" alt=\"graph comparing the processing performance of Node and Bun where Node operates around 3,200 ms and Bun around 1,500 ms source from 5ly.co\" class=\"wp-image-49300 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks.webp 1600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-300x248.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-1024x847.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-768x635.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-1536x1270.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-600x496.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-1200x992.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-730x604.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-1460x1207.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-784x648.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-1568x1297.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/01_cpu_intensive_tasks-877x725.webp 877w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1323;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node.js: 3400 ms (median response time)<\/li>\n\n\n\n<li>Bun: 1700 ms (median response time)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bun completed the task in half the time of Node.js. This 2023 result has aged well, too: <a href=\"https:\/\/strapi.io\/blog\/bun-vs-nodejs-performance-comparison-guide\" target=\"_blank\" rel=\"noreferrer noopener\">Strapi\u2019s 2026 comparison<\/a> cites the same test and calls it \u201ca reliable 2\u00d7 advantage.\u201d If your application involves heavy computation or data processing, that gap compounds into real compute savings.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. CRUD API Operations<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When it comes to typical CRUD (Create, Read, Update, Delete) operations, which are common in many web applications, the difference in performance is less pronounced.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The following were the results of running these CRUD operations with DynamoDB:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1600\" height=\"1323\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations.webp\" alt=\"graph comparing API performance involving an interaction with DynamoDB where Node slightly edges out Bun in median response time, from source 5ly.co\" class=\"wp-image-49302 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations.webp 1600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-300x248.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-1024x847.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-768x635.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-1536x1270.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-600x496.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-1200x992.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-730x604.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-1460x1207.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-784x648.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-1568x1297.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/02_crud_api_operations-877x725.webp 877w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1323;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node.js: 22 ms (median response time)<\/li>\n\n\n\n<li>Bun: 23 ms (median response time)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Here, Bun\u2019s performance was very close to Node.js, with just a 4.5% difference. If you\u2019re using a different database like <a href=\"https:\/\/www.dreamhost.com\/blog\/postgresql-vs-mysql\/\" target=\"_blank\" rel=\"noreferrer noopener\">MySQL or PostgreSQL<\/a>, the results may differ. However, we haven\u2019t tested the results on these databases.<\/p>\n\n\n\n\n\n<div class=\"glossary-term\">\n\t<a\n\t\tclass=\"glossary-term__above-title\"\n\t\thref=\"\"\n\t\ttarget=\"_blank\"\n\t\trel=\"noopener noreferrer\"\n\t>\n\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 640 512\"><path d=\"M320 32c-8.1 0-16.1 1.4-23.7 4.1L15.8 137.4C6.3 140.9 0 149.9 0 160s6.3 19.1 15.8 22.6l57.9 20.9C57.3 229.3 48 259.8 48 291.9v28.1c0 28.4-10.8 57.7-22.3 80.8c-6.5 13-13.9 25.8-22.5 37.6C0 442.7-.9 448.3 .9 453.4s6 8.9 11.2 10.2l64 16c4.2 1.1 8.7 .3 12.4-2s6.3-6.1 7.1-10.4c8.6-42.8 4.3-81.2-2.1-108.7C90.3 344.3 86 329.8 80 316.5V291.9c0-30.2 10.2-58.7 27.9-81.5c12.9-15.5 29.6-28 49.2-35.7l157-61.7c8.2-3.2 17.5 .8 20.7 9s-.8 17.5-9 20.7l-157 61.7c-12.4 4.9-23.3 12.4-32.2 21.6l159.6 57.6c7.6 2.7 15.6 4.1 23.7 4.1s16.1-1.4 23.7-4.1L624.2 182.6c9.5-3.4 15.8-12.5 15.8-22.6s-6.3-19.1-15.8-22.6L343.7 36.1C336.1 33.4 328.1 32 320 32zM128 408c0 35.3 86 72 192 72s192-36.7 192-72L496.7 262.6 354.5 314c-11.1 4-22.8 6-34.5 6s-23.5-2-34.5-6L143.3 262.6 128 408z\"\/><\/svg>\n\t\t<span><\/span>\n\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\"><path d=\"M342.6 233.4c12.5 12.5 12.5 32.8 0 45.3l-192 192c-12.5 12.5-32.8 12.5-45.3 0s-12.5-32.8 0-45.3L274.7 256 105.4 86.6c-12.5-12.5-12.5-32.8 0-45.3s32.8-12.5 45.3 0l192 192z\"\/><\/svg>\n\t<\/a>\n    <h3>Database<\/h3>\n    <p>A database is a collection of information accessible to computers. Databases are used to store information such as customer records, product catalogs, and financial transactions.<\/p>\n            <a\n            href=\"https:\/\/www.dreamhost.com\/glossary\/hosting\/database\/\"\n                        class=\"btn btn--white-outline btn--sm btn--round\"\n                                    target=\"_blank\"\n            rel=\"noopener noreferrer\"\n            >\n                            Read More                    <\/a>\n\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\">3. Cold Start Times<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cold start times are particularly important for serverless environments, where functions may need to initialize frequently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A test executing a &#8220;Hello World&#8221; function with induced cold starts revealed:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1600\" height=\"1323\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times.webp\" alt=\"comparison of an execution of a &quot;hello world&quot; function with induced cold starts where Bun shows a higher response than Node, from source 5ly.co\" class=\"wp-image-49304 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times.webp 1600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-300x248.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-1024x847.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-768x635.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-1536x1270.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-600x496.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-1200x992.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-730x604.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-1460x1207.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-784x648.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-1568x1297.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/03_cold_start_times-877x725.webp 877w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1323;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node.js: 290 ms (median response time)<\/li>\n\n\n\n<li>Bun: 750 ms (median response time)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In Fively\u2019s 2023 tests, Bun showed significantly longer cold starts than Node.js \u2014 early Bun simply wasn\u2019t optimized for serverless platforms. More recent evidence points the other way: a <a href=\"https:\/\/dev.to\/synsun\/bun-vs-nodejs-in-production-what-three-months-of-real-traffic-taught-me-3d96\" target=\"_blank\" rel=\"noreferrer noopener\">2026 production migration write-up<\/a> measured its heaviest AWS Lambda function cold-starting at about 940 ms on Node.js 22 and about 290 ms on Bun 1.2, with Node.js cold starts across its functions ranging from 800 ms to 1.4 seconds depending on each function\u2019s dependency footprint.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cold-start behavior clearly swings with runtime version and platform, so benchmark your own functions in <a href=\"https:\/\/www.dreamhost.com\/blog\/cloud-development-environment\/\" target=\"_blank\" rel=\"noreferrer noopener\">serverless environments<\/a> before you let this number decide anything.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Memory Usage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Efficient memory usage is important for scalability and resource management.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Monitoring memory consumption during CRUD operations showed:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1600\" height=\"1323\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage.webp\" alt=\"comparison monitoring memory consumption during CRUD operations where Bun shows memory usage about 20 MB higher than Node, from source 5ly.co\" class=\"wp-image-49306 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage.webp 1600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-300x248.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-1024x847.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-768x635.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-1536x1270.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-600x496.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-1200x992.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-730x604.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-1460x1207.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-784x648.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-1568x1297.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/04_memory_usage-877x725.webp 877w\" data-sizes=\"(max-width: 1600px) 100vw, 1600px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1600px; --smush-placeholder-aspect-ratio: 1600\/1323;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node.js: 40 MB (average memory used)<\/li>\n\n\n\n<li>Bun: 70 MB (average memory used)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In these 2023 tests, Bun used noticeably more memory than Node.js. Newer data disagrees: <a href=\"https:\/\/strapi.io\/blog\/bun-vs-nodejs-performance-comparison-guide\" target=\"_blank\" rel=\"noreferrer noopener\">Strapi\u2019s 2026 comparison<\/a> reports Bun using 25\u201340% less memory than Node.js for API servers, and a production migration found the two within about 15% of each other under sustained load. Memory behavior has shifted from release to release, so profile your own workload rather than trusting either number.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. HTTP Server Performance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bun has long claimed to outperform both Node.js and Deno in HTTP server performance; its 2022-era launch marketing put Bun.serve() at 377% faster than Node.js and 102% faster than Deno. Current third-party numbers are more grounded but point the same direction: in <a href=\"https:\/\/betterstack.com\/community\/guides\/scaling-nodejs\/nodejs-vs-deno-vs-bun\/\" target=\"_blank\" rel=\"noreferrer noopener\">Better Stack\u2019s January 2026 runtime comparison<\/a>, Bun handled over 52,000 requests per second, roughly 4x Node.js. Add a database and real routing, though, and the gap nearly vanishes: ByteIota\u2019s test of a production-grade URL shortener, cited in Strapi\u2019s 2026 comparison, measured 12,400 requests per second on Bun versus 12,000 on Node.js \u2014 a difference of less than 3%.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">These are impressive numbers, suggesting that Bun could be particularly well-suited for building high-performance <a href=\"https:\/\/www.dreamhost.com\/blog\/nginx-vs-apache\/\" target=\"_blank\" rel=\"noreferrer noopener\">web servers<\/a>. However, note that these benchmarks are a result of a small set of tests. (Wondering where Deno fits in? It\u2019s the security-first pick of the three \u2014 programs start with zero permissions unless you grant them \u2014 while Node.js is the stability pick and Bun the speed pick.)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The best way to gauge the performance differences is to actually perform similar tests on your customized setup to determine if switching to Bun makes a significant difference in your app performance.<\/p>\n\n\n\n\n\n<div class=\"glossary-term\">\n\t<a\n\t\tclass=\"glossary-term__above-title\"\n\t\thref=\"\"\n\t\ttarget=\"_blank\"\n\t\trel=\"noopener noreferrer\"\n\t>\n\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 640 512\"><path d=\"M320 32c-8.1 0-16.1 1.4-23.7 4.1L15.8 137.4C6.3 140.9 0 149.9 0 160s6.3 19.1 15.8 22.6l57.9 20.9C57.3 229.3 48 259.8 48 291.9v28.1c0 28.4-10.8 57.7-22.3 80.8c-6.5 13-13.9 25.8-22.5 37.6C0 442.7-.9 448.3 .9 453.4s6 8.9 11.2 10.2l64 16c4.2 1.1 8.7 .3 12.4-2s6.3-6.1 7.1-10.4c8.6-42.8 4.3-81.2-2.1-108.7C90.3 344.3 86 329.8 80 316.5V291.9c0-30.2 10.2-58.7 27.9-81.5c12.9-15.5 29.6-28 49.2-35.7l157-61.7c8.2-3.2 17.5 .8 20.7 9s-.8 17.5-9 20.7l-157 61.7c-12.4 4.9-23.3 12.4-32.2 21.6l159.6 57.6c7.6 2.7 15.6 4.1 23.7 4.1s16.1-1.4 23.7-4.1L624.2 182.6c9.5-3.4 15.8-12.5 15.8-22.6s-6.3-19.1-15.8-22.6L343.7 36.1C336.1 33.4 328.1 32 320 32zM128 408c0 35.3 86 72 192 72s192-36.7 192-72L496.7 262.6 354.5 314c-11.1 4-22.8 6-34.5 6s-23.5-2-34.5-6L143.3 262.6 128 408z\"\/><\/svg>\n\t\t<span><\/span>\n\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\"><path d=\"M342.6 233.4c12.5 12.5 12.5 32.8 0 45.3l-192 192c-12.5 12.5-32.8 12.5-45.3 0s-12.5-32.8 0-45.3L274.7 256 105.4 86.6c-12.5-12.5-12.5-32.8 0-45.3s32.8-12.5 45.3 0l192 192z\"\/><\/svg>\n\t<\/a>\n    <h3>Server<\/h3>\n    <p>A server is a computer that stores data. A web server is a type of server that stores web page data and then sends these web pages to users who request them over the internet.<\/p>\n            <a\n            href=\"https:\/\/www.dreamhost.com\/glossary\/hosting\/server\/\"\n                        class=\"btn btn--white-outline btn--sm btn--round\"\n                                    target=\"_blank\"\n            rel=\"noopener noreferrer\"\n            >\n                            Read More                    <\/a>\n\n<\/div>\n\n\n\n<h2 id=\"h2_node-vs-bun-how-do-the-features-compare\" class=\"wp-block-heading\">Bun vs. Node.js: How Do the Features Compare?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Now that we\u2019ve covered the performance differences, let\u2019s also look at the differences in features so you can decide which out of the two would be good for you.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Feature<\/strong><\/td><td><strong>Node.js<\/strong><\/td><td><strong>Bun<\/strong><\/td><\/tr><tr><td><strong>First release<\/strong><\/td><td>2009<\/td><td>2022 (stable 1.0 in September 2023)<\/td><\/tr><tr><td><strong>Current version (July 2026)<\/strong><\/td><td>26.x (24.x LTS)<\/td><td>1.3.x<\/td><\/tr><tr><td><strong>JavaScript Engine<\/strong><\/td><td>V8<\/td><td>JavaScriptCore<\/td><\/tr><tr><td><strong>Written in<\/strong><\/td><td>C++ and JavaScript<\/td><td>Zig (Rust from v1.4)<\/td><\/tr><tr><td><strong>Package manager<\/strong><\/td><td>npm (bundled)<\/td><td>Built-in<\/td><\/tr><tr><td><strong>TypeScript support<\/strong><\/td><td>Native (type stripping; stable since Node.js 24.12)<\/td><td>Native (full transpilation, including enums)<\/td><\/tr><tr><td><strong>Bundler<\/strong><\/td><td>Requires external tools<\/td><td>Built-in<\/td><\/tr><tr><td><strong>Test runner<\/strong><\/td><td>Built-in (node:test)<\/td><td>Built-in (Jest-compatible)<\/td><\/tr><tr><td><strong>Database clients<\/strong><\/td><td>Via npm packages<\/td><td>Built-in (PostgreSQL, MySQL, SQLite, Redis, S3)<\/td><\/tr><tr><td><strong>Windows support<\/strong><\/td><td>Native<\/td><td>Native (including ARM64)<\/td><\/tr><tr><td><strong>Package availability<\/strong><\/td><td>Very large<\/td><td>Growing<\/td><\/tr><tr><td><strong>Production readiness<\/strong><\/td><td>Battle-tested<\/td><td>Production-proven (Anthropic-backed since December 2025)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">1. Package Management<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">One of the first things you\u2019ll interact with when starting a new project is the package manager. Node.js and Bun take different approaches here.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/nodejs.org\/en\/learn\/getting-started\/an-introduction-to-the-npm-package-manager\" target=\"_blank\" rel=\"noreferrer noopener\">Node.js relies on npm<\/a> as its primary package manager. At this point, npm comes bundled with Node.js installations and has been the go-to solution for JavaScript developers for years. It\u2019s powerful, widely adopted, and has a vast registry of packages.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, npm can sometimes be slow, especially for large projects with a lot of dependencies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun, on the other hand, includes a built-in package manager that is significantly faster than npm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here\u2019s the performance benchmark Bun published for its package manager vs. pnpm, npm, and Yarn, captured from bun.sh in September 2024. Bun\u2019s current claim (<a href=\"https:\/\/bun.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">bun.com<\/a>, 2026) is that installs run up to 30x faster than npm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"2400\" height=\"1497\" data-src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines.webp\" alt=\"Bun vs. other package managers, where Bun installs in 0.36s, pnpm is 17x slower, npm is 29x slower, and Yarn is 33x slower\" class=\"wp-image-49308 lazyload\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines.webp 2400w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-300x187.webp 300w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1024x639.webp 1024w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-768x479.webp 768w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1536x958.webp 1536w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-2048x1277.webp 2048w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-600x374.webp 600w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1200x749.webp 1200w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-730x455.webp 730w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1460x911.webp 1460w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-784x489.webp 784w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1568x978.webp 1568w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-877x547.webp 877w, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/09\/05_bun_vs_other_runtines-1754x1094.webp 1754w\" data-sizes=\"(max-width: 2400px) 100vw, 2400px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 2400px; --smush-placeholder-aspect-ratio: 2400\/1497;\" \/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/bun.sh\/\">Source: bun.sh homepage, September 2024<\/a><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">It can use existing <strong>package.json<\/strong> files and <strong>node_modules<\/strong> directories, making it easier to transition existing projects. Bun\u2019s package manager is designed to be compatible with npm, allowing you to use most npm packages without issues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The built-in Bun package manager means you don\u2019t need to install or configure a separate tool and can simplify your development setup, potentially <a href=\"https:\/\/www.dreamhost.com\/blog\/ai-tools\/\" target=\"_blank\" rel=\"noreferrer noopener\">speeding up your workflow<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You don\u2019t have to switch runtimes to get that speed, either. Bun bills its tools as incrementally adoptable: <strong>bun install<\/strong> and <strong>bun test<\/strong> work inside an existing Node.js project while Node.js keeps serving production. If you adopt Bun piecemeal, commit the lockfile Bun generates and point CI at the same tool so every environment installs identically.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. TypeScript Support<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">TypeScript has become increasingly popular in recent years, offering static typing and improved tooling for JavaScript developers. The level of TypeScript support differs significantly between Node.js and Bun.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js added experimental type stripping in v22.6.0 (August 2024), and the transition has since completed: native TypeScript execution has been enabled by default since v23.6.0 (January 2025) and is <a href=\"https:\/\/nodejs.org\/api\/typescript.html\" target=\"_blank\" rel=\"noreferrer noopener\">marked stable as of Node.js 24.12<\/a>, per the official Node.js docs. Plain <strong>node your-file.ts<\/strong> now just works \u2014 no ts-node, no build step. Two caveats remain: Node.js strips only erasable syntax (enums and namespaces still need a build step or a third-party loader like <strong>tsx<\/strong>), and it ignores your <strong>tsconfig.json<\/strong> settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun, however, offers <a href=\"https:\/\/bun.sh\/docs\/runtime\/loaders\" target=\"_blank\" rel=\"noreferrer noopener\">native TypeScript support<\/a> out of the box. You can run <strong>.ts<\/strong> files directly without any additional configuration. That out-of-the-box TypeScript support saves a setup step and keeps your project configuration lean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun\u2019s remaining edge is fidelity: it transpiles the full TypeScript syntax \u2014 enums, namespaces, JSX \u2014 with zero configuration. If your project leans on those features, Bun still saves you a setup step.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On the basics, though, Node.js has caught up: both runtimes now run everyday TypeScript natively, and the choice comes down to transpilation fidelity and speed rather than support at all.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Bundling<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Developers use a \u201cbundler\u201d to reorganize and consolidate code from multiple files into fewer files. This is generally done to simplify deployment and efficiently manage dependencies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js doesn\u2019t come with a built-in bundler. Instead, developers typically use external tools like Vite, esbuild, or Rollup for bundling their <a href=\"https:\/\/www.dreamhost.com\/blog\/hosting-an-app\/\" target=\"_blank\" rel=\"noreferrer noopener\">applications<\/a>. While these tools are powerful and flexible, they require additional setup and configuration, which can add complexity to your project.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun, staying true to its all-in-one philosophy, includes a built-in bundler. The integrated bundler aims to simplify the development workflow by eliminating the need for separate bundling tools. It\u2019s designed to be fast and efficient, potentially reducing build times compared to traditional bundlers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. File Input\/Output (I\/O) Operations<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">File I\/O operations are common tasks in many applications, from reading configuration files to processing large datasets. You want a runtime that handles I\/O quickly and with minimal fuss.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js offers a comprehensive set of APIs for file I\/O operations through its <strong>fs<\/strong> (file system) module. These APIs are well-documented, widely used, and provide both synchronous and asynchronous methods for file operations. Node.js\u2019s event-driven architecture makes it particularly well-suited for handling I\/O-bound tasks efficiently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun also provides APIs for file I\/O operations, and it claims to offer faster performance in this area compared to Node.js. Bun\u2019s file I\/O APIs are designed to be largely compatible with Node.js, making it easier to port existing code.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The potential performance improvements in file I\/O operations could be significant for applications that deal with frequent file reads and writes, such as build tools, static site generators, or data processing scripts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. API Compatibility<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Switching runtimes or frameworks isn\u2019t the easiest job for a developer. You need to consider how much of your existing codebase needs to change. That\u2019s the same case for switching between Node.js and Bun.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js has a well-defined and stable <a href=\"https:\/\/help.dreamhost.com\/hc\/en-us\/articles\/217560167-Application-programming-interface-overview\" target=\"_blank\" rel=\"noreferrer noopener\">API<\/a> that developers have relied on for years. It includes core modules for tasks like file system operations, networking, cryptography, and more. The stability and completeness of the Node.js API are one of its strong points.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun aims for a high degree of compatibility with Node.js APIs. Many core Node.js modules and APIs work out of the box with Bun. Apart from the existing ones, Bun has many web standard APIs, which can make it easier to write code that works both in the browser and on the server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, even if Bun is compatible with Node.js APIs, it may not support everything you have already coded in Node. Some more nuanced use cases of Node in your project may require more work transitioning to Bun. One box Bun has ticked since its early days is platform support: it now runs natively on Windows, and the 1.3.10 release added ARM64 builds, per Bun\u2019s release notes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Packages and Community<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The package selection and community surrounding a runtime can be just as important as its technical features.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The thing is, there are thousands of people coding every day, solving new problems, creating reusable packages for the solutions, and sharing them with the community. You don\u2019t need to code everything from scratch every time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead, a strong package registry and community give you access to these pre-made solutions, so you can simply put the pieces of the puzzle together and complete your code.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">How do Node.js and Bun compare in this aspect, then? Let\u2019s check it out.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js boasts a vast package registry: millions of packages available through npm. Whatever functionality you need, chances are there\u2019s already a package for it. That depth can significantly speed up development, since you can use existing solutions instead of building everything from scratch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js also has a large, established community.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This means abundant resources, tutorials, blog posts, and third-party tools. If you encounter a problem, it\u2019s likely that someone else has already solved it and shared the solution.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bun, being newer, has a smaller but rapidly growing package selection and community. While it can use most npm packages, which helps bridge the gap, there may be fewer Bun-specific packages and resources available. That gap matters less than it once did: Bun\u2019s own site lists Claude Code, Midjourney, and Railway among its production users.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The community is active and enthusiastic, but it\u2019s not yet as large or established as the Node.js community. The stewardship question, at least, is settled: Anthropic acquired Bun in December 2025 and runs it as core infrastructure for Claude Code, while the project itself remains MIT-licensed open source. The old worry that a small-team runtime might stall midstream now has a payroll behind it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, Bun\u2019s growing community brings fresh energy and ideas to the JavaScript world. As an early adopter, you have the opportunity to shape the future of the platform and contribute to its growth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Test Runners<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Testing used to be an easy win for Bun. Not anymore \u2014 both runtimes now ship a built-in test runner.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js includes a stable built-in runner, <a href=\"https:\/\/nodejs.org\/api\/test.html\" target=\"_blank\" rel=\"noreferrer noopener\">node:test<\/a>, with describe\/it syntax, mocking, and snapshot testing \u2014 no Jest required for a basic suite. Bun\u2019s runner is Jest-compatible (the familiar expect() API, snapshots, watch mode, and DOM testing via happy-dom) and is typically faster. The catch when porting a large Jest suite to Bun is at the edges: module-mocking behavior doesn\u2019t match Jest in every case, so run your whole suite under Bun before you commit.<\/p>\n\n\n\n<h2 id=\"h2_when-to-choose-bun\" class=\"wp-block-heading\">When to Choose Bun<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bun\u2019s performance advantages and modern features make it well-suited for certain types of projects:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>CPU-intensive applications: <\/strong>Bun\u2019s performance advantages could be significant if your application involves heavy computation or data processing. Think of tasks like data analysis, machine learning, or complex calculations.<\/li>\n\n\n\n<li><strong>TypeScript-heavy projects<\/strong>: The native TypeScript support cuts build configuration for TypeScript-centric applications, which saves developer time and keeps CI simpler.<\/li>\n\n\n\n<li><strong>Quick prototyping<\/strong>: The built-in, all-in-one toolkit can help you get projects up and running quickly with less configuration. This could be particularly useful for hackathons, proof-of-concept projects, or rapid prototyping scenarios.<\/li>\n\n\n\n<li><strong>Performance-critical microservices<\/strong>: For microservices where every millisecond counts, Bun\u2019s speed improvements could be beneficial. This could apply to high-traffic APIs or services that need to handle a large number of requests quickly.<\/li>\n\n\n\n<li><strong>Developer tools<\/strong>: Bun\u2019s faster execution times could improve the experience for CLI tools and build scripts, potentially speeding up development workflows.<\/li>\n<\/ol>\n\n\n\n<h2 id=\"h2_when-to-choose-node-js\" class=\"wp-block-heading\">When to Choose Node.js<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js remains the go-to choice for many JavaScript projects due to its maturity, stability, and package depth:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Large-scale enterprise applications<\/strong>: Node.js\u2019s proven track record and extensive package support make it a safer choice for critical enterprise systems where stability and long-term support are crucial.<\/li>\n\n\n\n<li><strong>Projects with complex dependencies<\/strong>: If your application relies on a wide range of npm packages, Node.js ensures maximum compatibility and stability. This is particularly important for large, complex applications with many interdependent parts.<\/li>\n\n\n\n<li><strong>Serverless stacks you\u2019ve already tuned for Node.js<\/strong>: The cold-start evidence is split, as covered in the benchmarks above, so raw startup speed shouldn\u2019t decide this one. What still favors Node.js is familiarity: your existing layers, deployment tooling, and monitoring already assume it, and that maturity is worth something in production.<\/li>\n\n\n\n<li><strong>Security-sensitive deployments<\/strong>: Node.js ships a stable Permission Model (since v22.13.0) that can restrict filesystem, network, and child-process access at runtime \u2014 a meaningful defense while npm supply-chain attacks keep making headlines.<\/li>\n\n\n\n<li><strong>Memory-constrained environments \u2014 maybe<\/strong>: Fively\u2019s 2023 tests gave Node.js the smaller footprint, but Strapi\u2019s 2026 comparison found Bun using 25\u201340% less memory for API servers. This one has flipped between benchmarks, so measure your own app before it tips your decision.<\/li>\n\n\n\n<li><strong>For teams with deep Node.js expertise<\/strong>: If your team is already highly proficient with Node.js, the productivity gains from familiarity might outweigh Bun\u2019s performance benefits \u2014 at least in the short term.<\/li>\n<\/ol>\n\n\n\n<h2 id=\"h2_how-to-migrate-from-node-js-to-bun\" class=\"wp-block-heading\">How to Migrate From Node.js to Bun (Without Betting Production)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If the benchmarks have you curious, don\u2019t flip production over in a weekend. A staged migration keeps the risk boring:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Start with the tooling.<\/strong> Run <strong>bun install<\/strong> and <strong>bun test<\/strong> in your existing Node.js project. They\u2019re designed as drop-in tools, so you get the speed win without touching your runtime.<\/li>\n\n\n\n<li><strong>Audit the risky dependencies.<\/strong> Bun aims for 100% Node.js compatibility and passes over 90% of the Node.js test suite, but the usual friction points are native addons and observability agents. One 2026 production migration ran for two weeks with database query spans missing from Datadog, because dd-trace depends on Node.js internals (vm module behavior and async_hooks edge cases) that Bun implements differently. Run your full test suite under Bun and see what breaks.<\/li>\n\n\n\n<li><strong>Roll out in stages, with a rollback.<\/strong> Move one low-risk service first, keep your Node.js deployment path alive, and widen the rollout only after your metrics hold. In that same <a href=\"https:\/\/dev.to\/synsun\/bun-vs-nodejs-in-production-what-three-months-of-real-traffic-taught-me-3d96\" target=\"_blank\" rel=\"noreferrer noopener\">production write-up<\/a>, the runtime swap took about a day (package.json scripts went from ts-node commands to plain <strong>bun src\/index.ts<\/strong>), while restoring full monitoring took weeks.<\/li>\n<\/ol>\n\n\n\n<h2 id=\"h2_so-bun-vs-node-whats-your-choice\" class=\"wp-block-heading\">So, Bun vs. Node: What\u2019s Your Choice?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You\u2019ve made it through the Node.js vs. Bun comparison, and now you\u2019re wondering which runtime you\u2019ll choose for your next project.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The seasoned veteran Node.js, or the fast-moving challenger, Bun?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actually, we do have a recommendation. Choose Node.js by default for established production systems and dependency-heavy applications: its compatibility guarantees are still unmatched. Choose Bun when its faster tooling, or a gain you\u2019ve measured on your own workload, justifies the compatibility testing. And if you\u2019re torn, adopt Bun incrementally; <strong>bun install<\/strong> on a Node.js project is the lowest-risk first step.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js is like that comfy old sweater you\u2019ve had for years. It\u2019s reliable, familiar, and gets the job done. You know its quirks, and it knows yours. If you want a solid foundation with tons of packages at your fingertips, Node.js has your back.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And Bun? It brings faster tooling and more built-ins, and it\u2019s well past the experiment stage. The honest caveat is compatibility at the edges: native addons and observability agents still deserve a test run before production trusts them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So, why not take Bun for a spin on a small project? See how it handles your usual tasks. You might just find some use for it in your upcoming projects.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oh, and don\u2019t forget about finding a good home for your code. A <a href=\"https:\/\/www.dreamhost.com\/hosting\/vps\/\" target=\"_blank\" rel=\"noreferrer noopener\">DreamHost VPS<\/a> gives you the Linux environment and full root access you need to run either runtime: <a href=\"https:\/\/www.dreamhost.com\/hosting\/vps\/nodejs\/\">Node.js<\/a> or Bun. Use systemd or a compatible process manager for restarts and logs, and test your Bun-specific tooling before you deploy.<\/p>\n\n\n\n<h2 id=\"h2_bun-vs-node-js-faqs\" class=\"wp-block-heading\">Bun vs. Node.js FAQs<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Is Bun faster than Node.js?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For HTTP throughput and package installs, yes: Better Stack\u2019s January 2026 benchmark measured Bun at over 52,000 requests per second, roughly 4x Node.js. In database-bound applications, though, the two often land within a few percent of each other.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is Bun production-ready in 2026?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, for many workloads. Bun shipped a stable 1.0 in September 2023, sits on the 1.3.x line, and has been backed by Anthropic since December 2025, with production users including Claude Code, Midjourney, and Railway. Test native addons and monitoring agents before switching.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can Bun replace npm or Yarn?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. bun install is an npm-compatible package manager that reads your existing package.json, and you can use it in a Node.js project without changing runtimes. Bun claims installs run up to 30x faster than npm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does Bun compare to Deno?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Both are modern alternatives to Node.js. Bun optimizes for speed and all-in-one tooling, while Deno optimizes for security \u2014 programs start with zero permissions unless granted. In Better Stack\u2019s January 2026 HTTP benchmark, Bun led all three runtimes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can Bun run existing Node.js projects?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Often, yes. Bun aims for 100% Node.js API compatibility and passes over 90% of the Node.js test suite, but native addons and tools that patch Node.js internals are common exceptions. Run your test suite under Bun before moving production.<\/p>\n\n\n\n\n<div class=\"article-cta-shared article-cta-small article-cta--product\">\n\t<div class=\"tr-img-wrap-outer jsLoading\"><img decoding=\"async\" class=\"js-img-lazy \" src=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/themes\/blog2018\/assets\/img\/lazy-loading-transparent.webp\" data-srcset=\"https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/03\/product-cta-vps-hosting-877x586.webp 1x, https:\/\/www.dreamhost.com\/blog\/wp-content\/uploads\/2024\/03\/product-cta-vps-hosting.webp 2x\"  alt=\"VPS Hosting\" \/><\/div>\n\n\t<a href='https:\/\/www.dreamhost.com\/hosting\/managed-vps\/' class='link-top' target='_blank' rel='noopener noreferrer'>\n\t\t<span>Managed VPS<\/span>\n\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\" width=\"15\"><path d=\"M342.6 233.4c12.5 12.5 12.5 32.8 0 45.3l-192 192c-12.5 12.5-32.8 12.5-45.3 0s-12.5-32.8 0-45.3L274.7 256 105.4 86.6c-12.5-12.5-12.5-32.8 0-45.3s32.8-12.5 45.3 0l192 192z\"\/><\/svg>\n\t<\/a>\n\n\t<div class=\"content-btm\">\n\t\t<h2 class=\"h2--md\">\n\t\t\tWhen You Expect Performance Get DreamHost VPS\n\t\t<\/h2>\n\t\t<p class=\"p--md\">\n\t\t\tBig or small, website or application &#8211; we have a VPS configuration for you.\n\t\t<\/p>\n\n\t\t        <a\n            href=\"https:\/\/www.dreamhost.com\/hosting\/managed-vps\/\"\n                        class=\"btn btn--white-outline btn--sm btn--round\"\n                                    target=\"_blank\"\n            rel=\"noopener noreferrer\"\n            >\n                            See More                    <\/a>\n\n\t<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Is Bun really faster than Node.js? And which is best for your next project? If you\u2019re wondering whether Bun lives up to the buzz, check out our guide.<\/p>\n","protected":false},"author":1058,"featured_media":86585,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_opengraph-title":"Bun vs. Node.js: Which Is Better? - DreamHost","_yoast_wpseo_opengraph-description":"Bun vs. Node.js: compare performance, features, and use cases to pick the right JavaScript runtime for your next project.","_yoast_wpseo_twitter-title":"Bun vs. Node.js: Which Is Better? - DreamHost","_yoast_wpseo_twitter-description":"Bun vs. Node.js: compare performance, features, and use cases to pick the right JavaScript runtime for your next project.","toc_headlines":"[[\"h-bun-vs-node-the-short-answer\",\"Bun vs. Node.js: The Short Answer\"],[\"h-what-is-node-js\",\"Node.js at a Glance\"],[\"h2_what-is-bun\",\"What Is Bun?\"],[\"h2_bun-vs-node-js-performance-comparison\",\"Bun vs. Node.js: Performance Comparison\"],[\"h2_node-vs-bun-how-do-the-features-compare\",\"Bun vs. Node.js: How Do the Features Compare?\"],[\"h2_when-to-choose-bun\",\"When to Choose Bun\"],[\"h2_when-to-choose-node-js\",\"When to Choose Node.js\"],[\"h2_how-to-migrate-from-node-js-to-bun\",\"How to Migrate From Node.js to Bun (Without Betting Production)\"],[\"h2_so-bun-vs-node-whats-your-choice\",\"So, Bun vs. Node: What\u2019s Your Choice?\"],[\"h2_bun-vs-node-js-faqs\",\"Bun vs. Node.js FAQs\"]]","hide_toc":false,"show_updated_at":"1","footnotes":""},"categories":[12852],"tags":[],"class_list":["post-49283","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-website-design"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.3 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Bun vs. Node.js: Which Is Better? 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