Re web workers: is anyone (apart from Google) using this in practice? I assume Photopea and similar apps could benefit from it in some specific cases, but haven't had the need for them myself. Am I missing something?
I've experimented with using it together with TensorFlow.js to avoid blocking the UI thread while performing computationally expensive operations. Operations do take a bit longer to complete in a web worker compared to the main thread, but in return you get a smooth UI and a better user experience
Last I checked, they can only pass messages to the main thread as strings. All that (de)serialization can easily become a bottleneck, depending on the workload.
Yes we use it for relatively heavy processing in our web app. To not block the UI and allow offline use