--- title: Best Bun posts — August 2025 | daily.dev description: The most upvoted Bun posts from August 2025, curated by the daily.dev community. canonical: https://daily.dev/sources/bun/best-of/2025/08 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/bun/best-of/2025/08 og:type: website og:site_name: daily.dev og:title: Best Bun posts — August 2025 | daily.dev og:description: The most upvoted Bun posts from August 2025, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Bun — August 2025 1. 1 [](https://daily.dev/posts/500x-faster-postmessage-string--gpjaltzuz "500x faster postMessage(string)") Article Bun · 1y 500x faster postMessage(string) Bun v1.2.21 introduces a zero-copy optimization for postMessage(string) that achieves up to 500x faster performance and 22x less memory usage by avoiding serialization for thread-safe strings. The optimization works by directly sharing immutable string pointers between threads in JavaScriptCore, bypassing the Structured Clone Algorithm for strings that aren't atoms, substrings, or rope strings. This dramatically improves performance for common patterns like sending JSON between workers, with the optimization automatically applying to strings over 256 characters. 68 [See all Bun archives](/sources/bun/best-of) ```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","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/bun/best-of/2025/08#page","url":"https://daily.dev/sources/bun/best-of/2025/08","name":"Best Bun Posts — August 2025","description":"The most upvoted Bun posts from August 2025, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/bun/best-of/2025/08#items","numberOfItems":1,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/500x-faster-postmessage-string--gpjaltzuz","name":"500x faster postMessage(string)"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Sources","item":"https://daily.dev/sources"},{"@type":"ListItem","position":3,"name":"Bun","item":"https://daily.dev/sources/bun"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/sources/bun/best-of"},{"@type":"ListItem","position":5,"name":"August 2025"}]}]} ```