What reasons are there to prefer glob over readdir (or vice-versa) in Perl?

Question

This question is a spin-off from this one. Some history: when I first learned Perl, I pretty much always used glob rather than opendir + read

Answer 1

That was a pretty comprehensive list. readdir (and readdir + grep) has less overhead than glob and so that is a plus for readdir if you need to analyze lots and lots of directories.