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   t←↑¨↓⍉x  ⍝ inverted table

   ⍪¨ 3↑¨t
┌───────────────┬──┬──────────┐
│s              │41│ 196549161│
│ben9949        │16│1426044578│
│rank_transpose2│25│1926599481│
└───────────────┴──┴──────────┘
                             
   cmpx 'x⍳x' 't(8⌶)t'
 x⍳x    → 7.98E¯3 |   0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
 t(8⌶)t → 3.37E¯3 | -58% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕


   cmpx 'hashCRC⍨t' 'hashC  ⍨t'
 hashCRC⍨t → 1.09E¯3 |    0% ⎕⎕⎕⎕⎕⎕⎕
*hashC  ⍨t → 3.40E¯3 | +212% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕

   cmpx '8⌶⍨t' 'iC⍨t'
 8⌶⍨t → 3.36E¯3 |    0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
 iC⍨t → 6.73E¯3 | +100% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕