Unfortunately, I don't have your shiny Benchmark::Sized (I'm looking forward to its release), but there are my results using Benchmark::cmpthese: 

2;130 juerd@ouranos:~/modje/Blah/Acme/Tie/Handle/Blah/Acme-Tie-Handle-
+Blah--0.10$ perl -MBenchmark=cmpthese -e'$_="fooooo"; cmpthese(-1, {r
+e => sub {$a = !/^\.\.?\z/}, ne => sub { $a = ($_ ne "." and $_ ne ".
+."); }})'
Benchmark: running ne, re, each for at least 1 CPU seconds...
        ne:  1 wallclock secs ( 1.02 usr + -0.01 sys =  1.01 CPU) @ 12
+18808.91/s (n=1230997)
        re:  1 wallclock secs ( 1.09 usr +  0.00 sys =  1.09 CPU) @ 18
+03743.12/s (n=1966080)
        Rate   ne   re
ne 1218809/s   -- -32%
re 1803743/s  48%   --

[download]
Maybe this is because you used \Z, which is equivalent to $ if /s is not used. \z should be used (explained elsewhere in this thread). 
2;0 juerd@ouranos:~/modje/Blah/Acme/Tie/Handle/Blah/Acme-Tie-Handle-Bl
+ah--0.10$ perl -MBenchmark=cmpthese -e'$_="foo"; cmpthese(-0.3, { z =
+> sub { /o\z/ }, Z => sub { /o\Z/ } });'
Benchmark: running Z, z, each for at least 0.3 CPU seconds...
         Z:  2 wallclock secs ( 0.43 usr +  0.02 sys =  0.45 CPU) @ 36
+70015.56/s (n=1651507)
         z:  1 wallclock secs ( 0.44 usr + -0.01 sys =  0.43 CPU) @ 44
+19869.77/s (n=1900544)
       Rate    Z    z
Z 3670016/s   -- -17%
z 4419870/s  20%   --

[download]

- Yes, I reinvent wheels.
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In reply to Re: Re: Create a list of directories without . and .. by Juerd
in thread Create a list of directories without . and .. by BrowserUk

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