The original title is "Advanced JS Execution: Promises, Workers, and Comlink"

Short summary

A practical tutorial explaining why async/await doesn't prevent UI freezes during CPU-heavy work and how Web Workers solve the problem. It walks through six progressive examples from a frozen main-thread loop to Comlink-based workers, SharedArrayBuffer shared memory, and worker pools using Piscina on Node. Each example is a cloneable GitHub project with runnable code.

• •Promises handle waiting (I/O), not computing — heavy loops on the main thread still freeze the UI
• •Web Workers move CPU work to a separate thread; Comlink makes calling workers ergonomic with async/await
• •Progressive examples cover raw workers, shared memory, and worker pools for scaling

Generated with AI, which can make mistakes.