Jester: slow route affects other routes

[hendi]

Hi,

I'm using the following code:
    
    
    import jester, asyncdispatch
    import os
    
    routes:
      get "/slow":
        sleep(1000)
        resp "thanks for waiting"
      
      get "/fast":
        resp "whooosh"
    
    runForever()
    

I can get hundreds of requests per seconds on the /fast route. But once I add 
requests to the /slow route (even just 1-2 per second) the performance of the 
/fast route drops as well. So the /slow route appears to block the whole server.

How would I go about changing my code above to have the /slow route not affect 
the whole server?