--- title: "Eio 1.0 Release: Introducing a new Effects-Based I/O Library for OCaml" url: https://daily.dev/posts/eio-1-0-release-introducing-a-new-effects-based-i-o-library-for-ocaml-ezijx9z10 source_url: https://tarides.com/blog/2024-03-20-eio-1-0-release-introducing-a-new-effects-based-i-o-library-for-ocaml/ type: article source: "Lobsters" published: 2024-03-22T14:04:50.892Z updated: 2024-05-09T09:06:08.895Z tags: ["security", "ocaml"] reading_time: 9 upvotes: 0 comments: 0 language: 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. # Eio 1.0 Release: Introducing a new Effects-Based I/O Library for OCaml **[Lobsters](https://daily.dev/sources/lobsters)** · 9 min read · 0 upvotes · 0 comments ## Summary Eio 1.0 is a new effects-based I/O library for OCaml 5 that provides improved performance and security. It features a direct-style I/O stack, support for concurrency via effect handlers, and compatibility with modern kernel I/O advancements. The release focuses on performance and security, with optimizations for parallelism efficiency and distinct high-level and low-level interfaces. Eio differentiates itself from predecessors like Async and Lwt by using effect handlers, which enable natural direct-style coding for asynchronous I/O. The post also discusses the history of Eio, its main features, and plans for future iterations. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 0 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#ocaml](https://daily.dev/tags/ocaml) [View this post on daily.dev](https://daily.dev/posts/eio-1-0-release-introducing-a-new-effects-based-i-o-library-for-ocaml-ezijx9z10)