Appended qw(:all) to use Benchmark line.

Changed 1e6 to -5 to run for 5 seconds, rather than a particular count ... not that it makes much difference.

Changed timethese to cmpthese to generate the following table.

           Rate  range repeat
range  483495/s     --    -5%
repeat 507038/s     5%     --
            Rate  range2 repeat2
range2  485834/s      --     -4%
repeat2 506114/s      4%      --

I wouldn't get excited about a 4% or 5% difference ... bet you're making 25% inefficiencies elsewhere, assuming you aren't using algorithmns that are costing you hundreds of %. I don't mean just you, anybody's code, including mine.