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    It is much better faster to do this in two steps: 

...
            s/^\s+//;
            s/\s+$//;
        }

    use Benchmark;

...
            }
        },
    });

    Benchmark: timing 500000 iterations of one, two...
       one: 11 secs (11.75 usr  0.00 sys = 11.75 cpu)
       two:  8 secs ( 7.57 usr  0.00 sys =  7.57 cpu)