My system has 7GB ... (6GB free)

On my system, creating a list of 10_000_000 scalars on Perl's stack already takes roughly 700MB. So, as you have 10 times as many, 7GB is pretty close...

Try this 

$ perl -MList::MoreUtils -e'any {<>} 1..10_000_000'

[download]

and check its memory usage with top or ps (abort with ^C).

In reply to Re^3: Why it takes so much time here? by Eliya
in thread Why it takes so much time here? by PerlOnTheWay

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