Hard to say, as I can't really tell what your program is doing from top to bottom. It feels like maybe you're making a Perl equivalent to fuser or lsof. It may be, for example, faster overall to process on the fly versus parsing a bunch of things into a structure first.

In reply to Re^5: Converting hash structure into a special tree by kschwab
in thread Converting hash structure into a special tree by ovedpo15

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