AIX

When testing for performance take into account that the first test you run will put (parts of) the input file into the file cache. any subsequently run program will benefit from the data being already in cache.

I don't know if this has been taken into account by you, but the huge performance difference between "sed" and "awk" together with sed always being the first one mentioned looks suspicious to me.

bakunin

hi bakunin,

yes I thought about that, therefore I run the script twice and posted the second result

although the time it takes to open the file is minimal in comparison to the process runtime, but you are right, it should be taken into account