As I commented in To push and pop or not to push and pop?, there is almost no difference in the performance of shift, unshift, push and pop. This is not a place to look for efficiency gains - writers of the Perl code have already done it :).

A more efficient approach is to profile. Take a look at some of the answers in Using Devel::Profile output to know what to do next to get some ideas (found using Super Search for nodes whose titles contain "profile" in SoPW).

DWIM is Perl's answer to Gödel

In reply to Re: system implementation of arrays by GrandFather
in thread system implementation of arrays by esharris

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