My preference is to do the space trimming in two stages as it seems to be faster than either the capture or alternation methods.
use strict;
use warnings;
use Benchmark q{cmpthese};
my @arr = ( q{ fdsgehw fw wwfe w } ) x 5000;
cmpthese(
-5,
{
alternation => sub
{
my @new = @arr;
s{ ^\s* | \s*$ }{}gx for @new;
},
capture => sub
{
my @new = @arr;
s{ ^\s* (\S.*?) \s*$ }{$1}x for @new;
},
twoStage => sub
{
my @new = @arr;
s{ ^\s* }{}x for @new;
s{ \s*$ }{}x for @new;
},
},
);
The results.
Rate capture alternation twoStage
capture 8.96/s -- -26% -50%
alternation 12.2/s 36% -- -33%
twoStage 18.1/s 102% 48% --
I hope this is of interest. Cheers, JohnGG
Update: Fixed code indentation problems caused by TABs
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