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Re: Re: Re: Re: Re: Pure Perl tail call optimization

by pdcawley (Hermit)
on Mar 19, 2004 at 21:19 UTC ( #338178=note: print w/replies, xml ) Need Help??


in reply to Re: Re: Re: Re: Pure Perl tail call optimization
in thread Pure Perl tail call optimization

You'll note that the original subject was 'Tail call optimization' not 'Tail recursion optimization'. Tail call optimization comes in handy even when you're not recursing. It comes in handy when you're using lots of simple methods that simply return the results of a simple function call
package LeafNode; ... sub accept { my($self, $visitor) = @_; $visitor->visit_leaf($self); }
When you have tail call optimization in place, visit_leaf can return directly to accept's caller('s caller's caller's ...). Even without recursion, this can be a win because stack frames can be costly to create.

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