Questions about QCon'19 London talk

Alan Bateman Alan.Bateman at
Fri Dec 6 08:14:55 UTC 2019

On 05/12/2019 16:14, Ron Pressler wrote:
> :
> Well, for one, the entire structured concurrency API is very much in flux,
> so much so that it doesn’t exist in the current prototype at all. But in the
> API presented, the implicit call to close() in the TWR block waits for the
> completion of all threads; it does not attempt to cancel them.
Right, and I think these examples were from early 2019, a latter 
revision of that prototype could optionally cancel all remaining fibers 
at close to avoid the explicit cancel. It's not too different to an 
ExecutorService today where you use shutdownNow before waiting for it to 


More information about the loom-dev mailing list