Is this possible in Perl, or is there a strategy I can use that won't involve copying the entire contents of memory into each iThread?

Unfortunately, there is no way to do this efficiently in Perl if every thread needs to be able to access all the data.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: Using kernel-space threads with Perl by BrowserUk
in thread Using kernel-space threads with Perl by aberman

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