In a dump, the closure has the CLONED flag. You can also see the capture. 

SV = IV(0x582c494d89d0) at 0x582c494d89e0
  REFCNT = 1
  FLAGS = (ROK)
  RV = 0x582c494b36b0
  SV = PVCV(0x582c495314a8) at 0x582c494b36b0
    REFCNT = 2
    FLAGS = (ANON,CLONED,CVGV_RC,DYNFILE)
    COMP_STASH = 0x582c494b3530 "main"
    START = 0x582c494f9298 ===> 1
    ROOT = 0x582c494f9220
    GVGV::GV = 0x582c494eed80   "main" :: "__ANON__"
    FILE = "-"
    DEPTH = 0
    FLAGS = 0x14c0
    OUTSIDE_SEQ = 218
    PADLIST = 0x582c494ca480
    PADNAME = 0x582c494f87a0(0x582c494d5cc0) PAD = 0x582c494d8878(0x58
+2c494df290)
       1. 0x582c494eeb88<2> FAKE "$x" flags=0x0 index=2
    OUTSIDE = 0x0 (null)

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In reply to Re^4: Why is "any" slow in this case? by ikegami
in thread Why is "any" slow in this case? by Anonymous Monk

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