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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.



Update: Fixed code indentation problems caused by TABs

In reply to Re: Trimming whitespaces methods by johngg
in thread Trimming whitespaces methods by harishnuti

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