my (%withlex, %withglobal);

for (1 .. 10) {
   my $ref = sub { return $_ };
   $withglobal{$ref} = $ref;
}

for my $i (1 .. 10) {
   my $ref = sub { return $i };
   $withlex{$ref} = $ref;
}

print "Using lex num of subs is " . (keys %withlex) . "\n";
print "Using global num of subs is " . (keys %withglobal) . "\n";

##</code><code>##

Using lex num of subs is 10
Using global num of subs is 1