even w/o template, overhead doesn't become bigger.

use v5.12; makes the use strict; line obsolete

c:\Strawberry>perl -e"use v5.12; say 'works'"
works

c:\Strawberry>perl -e"use v5.12; say $x"
Global symbol "$x" requires explicit package name (did you forget to d
+eclare "my $x"?) at -e line 1.
Execution of -e aborted due to compilation errors.

c:\Strawberry>
[download]

update

So it's actually one character less.

Not sure why they didn't include "warnings" too.