$ perl -MDevel::Peek -e'Dump( "zzzzzz" )'
SV = PV(0x57f44e969f20) at 0x57f44e9980a8
  REFCNT = 1
  FLAGS = (POK,IsCOW,READONLY,PROTECT,pPOK)
  PV = 0x57f44e9e8140 "zzzzzz"\0
  CUR = 6
  LEN = 16
  COW_REFCNT = 0