My guess is that the OP wants to cut down on the number of processes - which many monks will tell you is "bad".

Personally, if I were to move within the file system, I would call rename (and use an external find to find the files); if I were to move from one filesystem to the other, I would realize the entire process is likely to be disk I/O bound, so I wouldn't care about the process calls.

In reply to Re^2: Optimizing files' moving with File::Find & File::Copy modules by JavaFan
in thread Optimizing files' moving with File::Find & File::Copy modules by Anonymous Monk

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