[strangemonad]

I’ve had no problems scaling jetty to 400-500 qps per node on small thread pools.

[mikmoila]

Jetty can be used with virtual threads: https://webtide.com/jetty-12-virtual-threads-support/

[Two4]

As soon as you start talking thread pools, you're talking about async task dispatching at some level, even if it's abstracted away at the API level. What I'm talking about is using a virtual thread, not event-driven shuttling of stateful objects between threads via task queues, to complete a request from start to finish.