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Comments on Is running AllDup on two folders separately faster, than running it once on both folders together? How does splitting files affect performance?
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Is running AllDup on two folders separately faster, than running it once on both folders together? How does splitting files affect performance?
I use AllDup to find and delete duplicate or similar pictures. To keep my question simple, suppose I am searching two folders. I own both Asus and Lenovo computers, but their technicians gave opposite answers. Who’s correct?
My Asus technician claims that is it faster to run AllDup on the first folder and delete all duplicates before running AllDup on the second folder. Why? Because if you run AllDup once on n files, AllDup must compare files n! (n factorial) times – ths is called combinatorial explosion..
But my Dell technician said it does not matter whether I run AllDup on all files once, or separately on each folder. Both take the same time.
In general, how does
- running AllDup on n files
compare with
- dividing files into N subsets and running AllDup N times, once for each subset?
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