Okay, I admit that opening a file 14334 times to see if it has a line matching the current item may not be the most efficient thing to do. In hindsight, reading the whole 2396 line data set (432 Kb) into memory might have been a better thing to do. *Taps watch*
3200 lines done so far. Time to check that I'm not "while"ing my way through every line after a match is found... Hmm, it seems that I am. Just in case an item is in there twice, though it shouldn't be. Meh. I think I'll leave it, just in case.
- Computing cost and elapsed time