tm ← {⍎,0 1↓(≠\∧⌿t∊'→|')/t←(¯2↑1,⍴⍵)⍴⍵} tm cmpx '+/○⍳1e6' '+/⌽○⍳1e6' 0.0156 0.022 tm cmpx '+/○⍳1e6' 0.0161