- On some systems (I forget which), it's #!/bin/env, not #!/usr/bin/env
- I've seen recent systems that didn't have env at all.
- It costs performance wise, with an extra fork
to get to env before you get to the Perl binary.
So, it's neither portable, efficient, nor necessary,
except for sufficiently narrow values for each of those three.
-- Randal L. Schwartz, Perl hacker
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