[15:00:05.53] c:\test>perl -nle"/234/ && ++$c }{ print $c" 1GB.dat
6791

[15:00:17.31] 
##     11.78 seconds

[15:01:05.67] c:\test>grep -c -F 234 1GB.dat
6791

[15:01:14.28] c:\test>
##      8.61 seconds