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Thank you all for your advice. My reading of your answers is that two approaches would help:
  • Reorganise into subdirectories as I originally thought
  • Use while instead of foreach
I have already converted to using while but I haven't had the chance to check for improvement yet. Can I have opinions on whether using both solutions together is worthwhile (pun not intended!)?

BTW, the file names are email addresses (opt-in list, no spam here I promise!!) with \W characters removed. I was planning to pick 2nd and 4th chars to name the subdirectories in order to avoid grubbiness. Any thoughts on that?


In reply to Re: Efficient processing of large directory by Elliott
in thread Efficient processing of large directory by Elliott

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