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WebAssembly (WASM) for High Performance Apps · Lesson

Web Workers with WASM Threads

Integrate Web Workers to run WASM modules on separate threads, preventing UI blocking and improving responsiveness.

Preventing UI Freezes

Web applications often need to perform complex tasks, like heavy calculations or data processing. If these tasks run directly on the main browser thread, they can cause the user interface (UI) to freeze and become unresponsive.

This leads to a poor user experience. To avoid this, we need ways to run code concurrently, or in parallel, without blocking the UI.

Meet Web Workers

Web Workers are a JavaScript feature that allows scripts to run in the background, separate from the main execution thread of a web page.

  • They have their own global scope.
  • They cannot directly access the Document Object Model (DOM).
  • They communicate with the main thread using messages.

This isolation is key to keeping your UI responsive.

All lessons in this course

  1. Web Workers with WASM Threads
  2. SharedArrayBuffer & Atomics for WASM
  3. Designing Concurrent WASM Applications
  4. Message Passing and Channels Between WASM Threads
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