x1 ← ?1e6⍴120 x2 ← ?1e6⍴32000 x4 ← ?1e6⍴2e9 cmpx '⌈/' ∘,¨ 'x1' 'x2' 'x4' cmpx '⍋' ∘,¨ 'x1' 'x2' 'x4' cmpx '{⍵[⍋⍵]}'∘,¨ 'x1' 'x2' 'x4' cmpx '⍳⍨' ∘,¨ 'x1' 'x2' 'x4'