http://www.perlmonks.org?node_id=719539


in reply to Re: Lexical closures
in thread Lexical closures

So let me see if I get this correctly... Perl's foreach creates a new lexical scope (i.e. a new binding a.k.a. stack frame) at each iteration.

Python's for loop doesn't do that, and hence the difference in behavior.

Does Perl's for (my $i = 0; $i < $N; ++$i) behave the same way?

I wonder about the tradeoffs here. It seems likely that foreach's creation of new scopes cost something. Does it make it inherenty slower than a for loop that would not create a scope ?