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Re: map versus for

by jbert (Priest)
on Aug 05, 2008 at 10:48 UTC ( #702315=note: print w/replies, xml ) Need Help??


in reply to map versus for

You're right. I'm surprised too (not least because map could actually be implemented that way within perl...). I get a lot of variability (perl 5.8.8, x86_64-linux-gnu-thread-multi), but the for loop is a little faster.

All the comments about better style still stand, but I would certainly have expected the map to be faster. This is odd. Anyone have a 5.10 to hand to see if anything has changed?

Sidenote:

# Populate list with 10 mio numbers for (my $i=0; $i<1000_000; $i++) { push @results, $i; }
is perhaps better written as: my @results = (0..1_000_000); (Of course, given your observation regarding map, whether it performs better is now a whole 'nother ball of wax.)

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[Discipulus]: who make the invitation? the program?!?
[choroba]: it's historical
[erix]: pull requests
[choroba]: originally, you sent a pull request to someone by email, i.e. you asked them to pull from your repo
[Discipulus]: if is the author of a patch, is more like a 'request to push' into rather than a pull request..
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[Discipulus]: chorobayour words are reasonable

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