Reading large files is likely to be I/O bound not CPU bound, so it's not surprising that making it multi-threads didn't help.

You could try profiling your single threaded version to see where the time is being spent, and then try to improve that.

How do I profile my Perl programs?

But your code looks pretty simple, so it may not have much improvement to give.

In reply to Re: problem of my multithreading perl script by RichardK
in thread problem of my multithreading perl script by qingfengzealot

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