Good day\night collective mind.
Somehow I ask myself question. What method faster for large vector data.
All my life I believe that "map" faster. But..
So here results.
This is perl 5, version 20, subversion 2 (v5.20.2) built for x86_64-linux-gnu-thread-multi

intel I3, 2024 mb mem.
-------------------------------------------------
my @a;
$a[$_] = int(rand (100)) for(0..10000000);

[download]

-------------------------------------------------

foreach(@a){$_+=1;};

real 0m3.687s
user 0m3.556s
sys 0m0.120s

--------------------------------------------------

@a = map{$_+= 1} @a;

real 0m7.719s
user 0m7.104s
sys 0m0.556s


So question. In what kind of situations map function is more applicable then for\foreach\while?

In reply to map vs for\foreach. by builat

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