Package: perl-doc Version: 5.24.1~rc3-3 Severity: wishlist File: /usr/share/man/man1/perlvar.1.gz
Since you say
In Perl 5.20.0 a new copy-on-write system was enabled by default, which
finally fixes all performance issues with these three variables, and
makes them safe to use anywhere.
Then perhaps don't still say
print $`, $&, $'; # bad: perfomance hit
print # good: no perfomance hit
above it.

