Select Code to Download

...
sub lookbehind {
...
unroll     2990/s         --        -3%       -35%
rollahead  3092/s         3%         --       -32%
lookbehind 4570/s        53%        48%         --

          rollahead => @# #@## ##@  ##@## #@# # @# #@## ##@@# #@## ##@
+@# #@ ...
             unroll => @# #@## ##@  ##@## #@#  @# #@## ##@@# #@## ##@@
+# #@# ...

          lookbehind => #@## ###@#### #####@  #####@#### ###@## # #@##
+ ###@#### ...