What version of Windows are you running? What version of Windows are the servers running?
If you are using Win2K or NT clients/servers your performance should be decent. I've had perl scripts that process over 10K files across a local network in about 10-15 minutes.
If Win9X/ME is used, you'll have a performance hit there.
What kind of connection do you have to the share? You mention 'the far east', are you talking about processing files across a trans-ocean hop?
I had code that copied files from a CD-ROM into a particular directory structure on a network share. The Win95 machine with the CD-ROM was in one city while the NT file server was 12 or 14 hops away in another city (about 40 miles) across several T1 lines. It took about 2 to 3 hours to copy 300MB to 400MB of data.
Be default, File::Find does a CHDIR into each directory it processes. You might pick up some speed if you disabled it.
i.e. find( {wanted => \&wanted(), no_chdir => 1}, 'm:/');
Finally, if the process is too slow, you might want to consider moving the data closer to you or your code closer to the data.
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