x ← ¯1e9 + ?1e6⍴2e9
cmpx '(∪x)⍳x' '{(∪⍵)⍳⍵}x⍳x'
(∪x)⍳x → 5.08E¯1 | 0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
{(∪⍵)⍳⍵}x⍳x → 3.87E¯1 | -24% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
x ← (2*¯24) × ¯1e9+?1e6⍴2e9
cmpx '(∪x)⍳x' '{(∪⍵)⍳⍵}x⍳x'
(∪x)⍳x → 9.53E¯1 | 0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
{(∪⍵)⍳⍵}x⍳x → 3.83E¯1 | -60% ⎕⎕⎕⎕⎕⎕⎕⎕
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