File Reading operation....

Question

I need to understand the performance of parser written in any language when parsing the below mention two format of the text file... Format 1: the length of the single line is 20000 characters. Format 2: You have 20 different lines each of 1000 characters. So when writing the parser to read the above mentioned file, which format of the file will have better performance and no memory errors etc.... Obviously the file will have 1000's of records, but the above format is just to give an example... I understand its a silly question but ??? Thanks, Raj.