Arun kumar Velu

I haven’t benchmarked WebAssembly inside a Web Worker for this post, so I wouldn’t claim a performance improvement yet. It would be interesting to measure worker startup, Wasm loading/initialization, and computation separately, then compare them with JavaScript on the main thread and JavaScript in a worker. My expectation is that startup costs matter more for short, one-off tasks, while reusing an initialized worker may make more sense for repeated heavy calculations—but I’d want measurements for the specific workload before drawing a conclusion.

a cancellation message cannot interrupt a synchronous JavaScript loop already running in that worker. The worker must divide expensive work into chunks and yield between them, giving its event loop a chance to receive the cancellation message. setTimeout() is one way to schedule the next chunk; repeatedly awaiting Promise.resolve() is not an equivalent yield to incoming message events because microtasks run before the next task.