Hi everyone, I'm new to Perl and new to this site too, so don't mind my silly question. I've a problem: There's two huge files (one is 37 MB, another is 5 MB), now all I have to do is, take a substring of each line from the big file, compare with a substring of all the lines in the small file, and whenever there's a match, the whole line of the big file appended with the some portion of the matching line from the small file goes to a separate file, say file1. If there isn't any match, the line goes to another file, say file2. Now using simpler and straight ways, I got this working, but the time took around 22-30 minutes. While an equivalent shell+awk+sed script took around 15 minutes. Now, I can't run the shell script in Windows, I got to do the stuff in Perl, so my question is: is there any way (or trick may be) by which I can decrease the total processing time considerably? And one more thing, its best if I could do this with the standard libraries that come with Perl, as installing extra ones on a restricted network could be a problem. Please help!

In reply to Managing huge data in Perl by soura_jagat

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