shift8@2axxon:~$ perl t.pl
Benchmark: running a, b, c, d, e for at least 1 CPU seconds...
         a:  1 wallclock secs ( 1.14 usr +  0.00 sys =  1.14 CPU) @ 25784.21/s (n=29394)
         b:  1 wallclock secs ( 1.09 usr +  0.00 sys =  1.09 CPU) @ 32879.82/s (n=35839)
         c:  1 wallclock secs ( 1.05 usr +  0.01 sys =  1.06 CPU) @ 4610.38/s (n=4887)
         d:  1 wallclock secs ( 1.05 usr +  0.00 sys =  1.05 CPU) @ 4265.71/s (n=4479)
         e:  1 wallclock secs ( 1.04 usr +  0.00 sys =  1.04 CPU) @ 322.12/s (n=335)
     Rate      e      d      c      a      b
e   322/s     --   -92%   -93%   -99%   -99%
d  4266/s  1224%     --    -7%   -83%   -87%
c  4610/s  1331%     8%     --   -82%   -86%
a 25784/s  7905%   504%   459%     --   -22%
b 32880/s 10107%   671%   613%    28%     --
<perldata>
 <hashref memory_address="0x82252f8">
  <item key="1">
   <arrayref memory_address="0x814bc28">
    <item key="0">123</item>
    <item key="1">456</item>
    <item key="2">678</item>
   </arrayref>
  </item>
  <item key="2">value_2</item>
  <item key="3">value_3</item>
  <item key="4">value_4</item>
  <item key="5">value_5</item>
  <item key="6">value_6</item>
  <item key="7">value_7</item>
  <item key="8">value_8</item>
 </hashref>
</perldata>