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The most graceful way to invoke a Perl subroutine when its name is stored in a variable is to use the arrow operator (->) to dereference the reference to the subroutine and then call it as a regular function. For example:

my $sub_name = 'my_subroutine';
my $sub_ref  = \&{$sub_name};

# Invoke the subroutine using the arrow operator
$result = $sub_ref->(@args);

This method is more elegant than using the & symbol to call the subroutine, as it avoids some ambiguities and potential issues with prototype checking.