$ 5.42t/bin/perl -MDevel::Peek -e'Dump( "zzzzzz" )'
SV = PV(0x582cd0b72f20) at 0x582cd0ba1098
  REFCNT = 1
  FLAGS = (POK,IsCOW,READONLY,PROTECT,pPOK)
  PV = 0x582cd0ba4a40 "zzzzzz"\0
  CUR = 6
  LEN = 16
  COW_REFCNT = 0

$ 5.40t/bin/perl -MDevel::Peek -e'Dump( "zzzzzz" )'
SV = PV(0x6381a4328f20) at 0x6381a4357028
  REFCNT = 1
  FLAGS = (POK,IsCOW,READONLY,PROTECT,pPOK)
  PV = 0x6381a43a7d10 "zzzzzz"\0
  CUR = 6
  LEN = 16
  COW_REFCNT = 0