[koakuma-chan]

What is not performant about tokio? Do you know a better async runtime? I also heard tokio's "multi-thread" scheduler had some performance issues.

[jvanderbot]

Nothing is wrong with tokio, actually. I chose the wrong word

async != performance

async == concurrency

Unless you face a specific kind of slowdown, concurrency, and therefore async (and therefore tokio) is not a panacea. Many do face that slowdown, so for many it is.