Visualizing Async Context

[kjin]

Given that we are deep diving into async context at the WG meeting this Wednesday, I think a good topic to discuss is that of visualizing async context. I've been working on a text-based visualizer tool to help me understand the semantics behind async_hooks:

I can talk about it more during the meeting. I think it'll be useful as we try to unify ideas in async-context-definition and async_hooks.

I haven't used it yet, but @ofrobots has pointed out to me that dprof already presents this information in a similar manner, and in shiny HTML to boot.

If anyone has other ways of helping explain async context through visualization tools, please post them here.