You seem to have misunderstood what I said. Whether copying occurs in an array to array assignment or not depends on whether Perl does COW or not. If it does, copying can be avoided. If it doesn't copying must occur. It doesn't, so copying must occur. And thus, the OP's question is answered.

In reply to Re^3: returning large arrays from functions by ikegami
in thread returning large arrays from functions by perl5ever

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