vibe.d with explicit threads/threadpool instead of fibers

[Arun Chandrasekaran via Digitalmars-d-learn]

On Tuesday, 25 October 2016 at 21:23:21 UTC, Arun Chandrasekaran 
wrote:
> I am looking for a RESTful framework in D, which can interact 
> with an existing backend processes (C++) via ZeroMQ and shared 
> memory. I thought vibe.d might be a viable option. But I 
> discussed with someone on Freenode #d and found that vibe.d 
> doesn't support explicit threading [1].

I looked at vibe.d examples, one of them uses futures [1], which 
implies explicit thread handling is possible. But I'm not sure 
about pre-spawned threadpool.

[1] 
https://github.com/rejectedsoftware/vibe.d/blob/master/examples/future/source/app.d