$count=-1
(warning: too few iterations for a reliable count)
      Rate  for  map
for 2.67/s   -- -10%
map 2.98/s  12%   --

$count=-5
      Rate  map  for
map 3.05/s   -- -16%
for 3.61/s  18%   --

$count=-10
      Rate for map
for 2.73/s  -- -8%
map 2.95/s  8%  --