I see that EventStream is using std::thread and std::sync::mpsc at now. It is of course an improvement according to #448. However, I'd like to suggest a possible improvement, with the usage of spawn and channels in specific async runtime, for example, tokio or async-std. Therefore, the async runtime could manage the event stream thread.

The replacement in tokio is spawn and mpsc.

The replacement in async-std is spawn and channel.

Both of them should be drop-in replacement, rewritting some functions to async ones. I'd like to open a pull request later, trying to add the implementation as an optional feature, and keep the original implementation as a fallback one.