)copy dfns cmpx

   b←1≠?1e6⍴10
   cmpx 'b⊥b' '+/∧\⌽b'
  b⊥b    → 1.07E¯7 |      0%
  +/∧\⌽b → 5.08E¯5 | +47471% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕


   ⎕←t←1 1 cmpx 'b⊥b' '+/∧\⌽b'
0 0.0000509338

   ⎕←t←{x∘←?⍵⍴⍵ ⋄ 1 1 cmpx 'x∘.=x'}¨ 100×1 2 4 8 16
0.00000291634 0.00000606537 0.0000192719 0.0000800171 0.000331299

   2 ÷⍨/ t
2.07979 3.17736 4.15202 4.14035

   (+⌿÷≢) 2 ÷⍨/ t
3.38738