perlquestion murugu <p>My friend is having two text files a and b. a is having 400 lines and b is having 50000 lines. He needs to compare the files and write in to a new log file where the matched contents should be written. <p>My friend's boss thinks that fetching 'a' line by line and comparing it with the file b at a stretch is effecient. But what my friend suggested is to open the file 'b' line by line and compare it with a regular expression framed by joining all the lines of a with '|'. My friend asked me which one is better and efficient. I thought that what my friend suggested is efficient. <p>Monks, please suggest us which method we should go for. Is there any other effecient way to do this? <p>Million thanks in advance. <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-323803"> <p>Regards,<br>Murugesan Kandasamy<br>use perl for(;;); </div></div>