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  1. or download this
    use feature qw( say );

...
my $packed = pack("w*",$num);
say total_size($packed);
Dump($packed);
  2. or download this
    24
SV = IV(0x768010) at 0x768018    <-- See SVt_IV image below
...
  PV = 0x7d6520 "\207h"\0
  CUR = 2                        <-- Even though only 3 are needed,
  LEN = 8                        <-- 8 byte string buffer allocated
  3. or download this
    16
SV = IV(0x51a100) at 0x51a104    <-- See SVt_IV image below
...
  PV = 0x5b4334 "\207h"\0
  CUR = 2                        <-- Even though only 3 are needed,
  LEN = 12                       <-- 12 byte string buffer allocated