parallel threads stalls until all thread batches are finished.

[Joe at bloow.edu]

On Wednesday, 23 August 2023 at 14:43:33 UTC, Sergey wrote:
> On Wednesday, 23 August 2023 at 13:03:36 UTC, Joe wrote:
>> I use
>>
>> foreach(s; taskPool.parallel(files, numParallel))
>> { L(s); } // L(s) represents the work to be done.
>
> If you make for example that L function return “ok” in case 
> file successfully downloaded, you can try to use TaskPool.amap.
>
> The other option - use std.concurrency probably.

Any idea why it is behaving the way it is?