c:\test>\Perl510\bin\perl5.10.0.exe -s junk9.pl -N=1e2
       Rate ysth  tye   OP  buk
ysth 2326/s   -- -50% -64% -72%
tye  4670/s 101%   -- -27% -45%
OP   6417/s 176%  37%   -- -24%
buk  8419/s 262%  80%  31%   --

c:\test>\Perl510\bin\perl5.10.0.exe -s junk9.pl -N=1e5
       Rate ysth   OP  tye  buk
ysth 1.83/s   -- -32% -46% -69%
OP   2.70/s  48%   -- -21% -55%
tye  3.42/s  87%  26%   -- -43%
buk  5.98/s 227% 121%  75%   --

c:\test>\Perl510\bin\perl5.10.0.exe -s junk9.pl -N=1e6
     s/iter    OP  ysth   tye   buk
OP     43.0    --  -54%  -60%  -96%
ysth   19.9  116%    --  -14%  -91%
tye    17.1  151%   16%    --  -90%
buk    1.72 2400% 1056%  896%    --