C:\test>timeit \perl64\bin\perl.exe -nle1 1GB.dat
Took: 9.687471720 seconds

C:\test>timeit \perl64\bin\perl.exe -nle1 1GB.dat
Took: 9.544258000 seconds

C:\test>timeit \perl64\bin\perl.exe -nle1 1GB.dat
Took: 9.708372520 seconds