While message passing is a great way to send data, there are some problems when it comes to sending very large objects across the channel. For instance, let's say we have a dedicated worker that makes requests on our behalf and also adds some data to the worker from a cache. It could potentially have thousands of records. While the worker would already be taking up quite a bit of memory, as soon as we utilize postMessage we will see two things:
- The amount of time it takes to move the object is going to be long
- Our memory is going to increase dramatically
The reason for this is the structured clone algorithm that browsers use to send the data. Essentially, instead of just moving the data across the channel, ...