I want to test what’s the different between a map function and a for iteration with Perl is:
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#!/usr/bin/perl use strict; use Benchmark qw(:all) ; my @arr = (1..10); print sub_map(@arr).$/; print sub_for(@arr).$/; cmpthese(-1, { 'sub_map' => sub {sub_map(@arr)}, 'sub_for' => sub {sub_for(@arr)}, }); sub sub_map { return join",", map {$_ * 2} @_; } sub sub_for { for (@_){ $_ = $_*2; } return(join",",@_); } |
Our Benchmark result:
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2,4,6,8,10,12,14,16,18,20 2,4,6,8,10,12,14,16,18,20 Rate sub_for sub_map sub_for 129153/s -- -10% sub_map 142717/s 11% -- |
map is about 11% faster than a simple for loop.
Hey I know this is off topic but I was wondering if you knew of any widgets I could add to my
blog that automatically tweet my newest twitter updates.
I’ve been looking for a plug-in like this for quite some time and
was hoping maybe you would have some experience with something like this.
Please let me know if you run into anything. I truly enjoy
reading your blog and I look forward to your new updates.