Hi,
What I have to do is: 1- Read Line from an input file 2- Validate the raw (for example: is second char == 2?) 3- Split the line 4- Write the validated and splitted raw in an output file whit a different order (for example: last 2 digits I have to write as first 2 digits) I have to loop it for 15 MILLION line!!!! How long does perl takes? The program I written takes 25 sec for 10.000 line... too much.... Do you have suggestion? I have to think in parallel way? (fork ?!?!) Thanks Lorenzo