The latest articles on DEV Community by Mark Galea (@cloudmark). https://dev.to/cloudmark https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3862056%2F9fea5c7f-d13c-4dc4-bf29-9f8c25d8615d.png https://dev.to/cloudmark en Mark Galea Sun, 05 Apr 2026 09:27:35 +0000 https://dev.to/cloudmark/cats-actors-210-typed-actors-now-running-on-jvm-scala-native-and-scalajs-5go3 https://dev.to/cloudmark/cats-actors-210-typed-actors-now-running-on-jvm-scala-native-and-scalajs-5go3 <p>Cats-Actors is a typed actor library built on top of Cats Effect. With the 2.1.0 release it now runs cross-platform — the same actor code works on JVM, Scala Native, and Scala.js.</p> <h2> What's new </h2> <p>The interesting bit under the hood is the cross-platform mailbox — <code>LinkedTransferQueue</code> on JVM and <code>cats.effect.std.Queue</code> on JS and Native, behind a shared interface so your actor code never needs to know which platform it's on.</p> <h2> Two samples to get you started </h2> <p>The first is a ring benchmark — N actors relay a token for a configurable number of hops. Run it on JVM and Native and you can see the difference in throughput and startup time firsthand.</p> <p>The second is a browser demo — 8 actors throwing bananas at each other, compiled to Scala.js with Slinky React and running live in the browser. You can see it in action directly in the blog post.</p> <h2> Links </h2> <ul> <li>Blog post with full walkthrough and live demo: <a href="https://cloudmark.github.io/Cats-Actors-Native-And-JS/" rel="noopener noreferrer">https://cloudmark.github.io/Cats-Actors-Native-And-JS/</a> </li> <li>GitHub: <a href="https://github.com/cloudmark/cats-actors" rel="noopener noreferrer">https://github.com/cloudmark/cats-actors</a> </li> </ul> <p>Thanks to <a href="https://github.com/rlavolee" rel="noopener noreferrer">@rlavolee</a> and <a href="https://github.com/Voltir" rel="noopener noreferrer">@Voltir</a> for making the cross-platform support happen!</p> scala functionalreactiveprogramming webdev opensource