perl ithreads are not actual light weight OS threads that share the same common name (nobody actually says "ithreads" referring to perl "threads" from what I've seen) and many people look at them merely because of this unfortunate naming choice. Maybe OP wants to look at Coro.

https://metacpan.org/pod/Coro#WINDOWS-PROCESS-EMULATION

In reply to Re^2: Looking for alternative for IPC::Shareable (or increase size) by perlfan
in thread Looking for alternative for IPC::Shareable (or increase size) by DomX

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