[newbie] [mp2] when are inline/anonymous subs compiled?

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Hi folks, apologies if this is well known information, I did search!

My response method-handler reads a template and I want to call a different
sub for each type of 'field' I find.  I also want other packages to be able
to 'register' new subs for new 'field' types.  I'm not sure wether to use a
hash of anonymous subs or regular subs.

Question is, do anonymous subs assigned to hash values and placed in the
'new' method get compiled every time a new object is created or just when
the module file is initially loaded?

cheers
John
--

----------------- (more detailed info follows)

I have a templating system using a method handler for the Response phase
with non-persistent objects:

sub r ($$) {
     ...read template etc...
     while( template matches /(field-type)/ ){
          defined(&{$1}) and print &{ $1 };   #### using non-anonymous subs
  ## OR ##   defined(&{$code{$1}}) and print &{$code{$1}};  #### using anon
subs
     }
}

sub new { my $self=shift; my $code={};

     #### if using anon subs, define them here:
     $$code{type1} = sub { do something cool; }
     $$code{type2} = sub { do something cooler; }
     $$code{type3} = sub { do something even cooler; }

     bless $self=>$code;
}


##### if using non-anon subs, define them here:

sub type1 { do something cool; }
sub type2 { do something cooler; }
sub type3 { do something even cooler; }