Rust Async Patterns in Tauri — Keeping the UI Responsive While Rust Does Heavy Work

If this is useful, a ❤️ helps others find it. All tests run on an 8-year-old MacBook Air. A Tauri app has two threads that matter: the main thread (UI) and whatever tokio spawns. Block the main thread and the UI freezes. Block for too long in a command and the frontend times out. Here's how I keep things responsive in practice. The basic rule Never do blocking work in a #[tauri::command] without async . // Bad — blocks the thread pool #[tauri::command] pub fn compress_pdf ( path : String ) -> Re