How would you architect a thread pool using Web Workers to process a large task queue efficiently?

0-2 years experience

1. 1Suppose you need to offload image thumbnail generation to a Web Worker pool in a single‑page app. How would you set up the pool and assign each image task?
2. 2If you have a queue of 50 small calculations and you create three Web Workers, what happens when a worker finishes its current job? How do you ensure the next task is processed?

2-5 years experience

1. 1You added a Web Worker thread pool to handle user‑uploaded video transcoding, but the UI becomes sluggish after a few minutes. What could be causing the slowdown and how would you debug it?
2. 2When scaling the worker pool from 2 to 8 workers, you start seeing memory spikes and occasional crashes. What trade‑offs would you consider and how would you adjust your design?

5-8 years experience

1. 1Design a robust thread‑pool manager using Web Workers that can handle a dynamic task queue, back‑pressure, and graceful shutdown in a real‑time collaborative editor. What components would you include and why?
2. 2How would you modify your Web Worker pool to support tasks that may fail or need retries, while preventing a single faulty task from exhausting the pool?

8+ years experience

1. 1Your company is migrating a legacy monolithic data‑processing service to a client‑side Web Worker pool for offline analytics. What architectural considerations, cross‑team impacts, and long‑term maintenance strategies would you propose?
2. 2If multiple teams need to share a common Web Worker pool library across different codebases, how would you design the API and versioning strategy to accommodate differing performance requirements and ensure backward compatibility?