[PD] Fastest way to find lines in text file

[Jack]

Hello,

I need to find every lines of a textfile containing a word.
The textfile has 2.539.592 lines.
Now, i am using [msgfile] from zexy because i can find a line, skip a
line and find again ... until the end of the textfile.
But, i am wondering if there is an other object (in an other library)
faster, specialized in this work ?
Thanx.
++

Jack