Ember concurrency vs Web workers

I'm looking to sort through a huge JSON object without blocking any of the UI rendering that goes on.

I'm confident that Web workers achieve this (as this is one of the main use cases for it). However from the docs it doesn't seem that Ember-concurrency achieves non-blocking state. It only mentions how it makes life easier to deal with async functions. Is Ember concurrency a non-blocking library? If so how does it differ from Web workers?