Question on shared memory concurrency

[Andy Valencia]

On Monday, 4 March 2024 at 03:42:48 UTC, Richard (Rikki) Andrew 
Cattermole wrote:
> A way to do this without spawning threads manually:
>...

Thank you!  Of course, a thread dispatch per atomic increment is 
going to be s.l.o.w., so not surprising you had to trim the 
iterations.

Bug I still hope to be able to share memory between spawned 
threads, and if it isn't a shared ref of a shared variable, then 
what would it be?  Do I have to use the memory allocator?