nested←1⍴¨1000/1
cmpx '∊+/nested' '+/∊nested'
∊+/nested → 3.3E¯5 | 0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
* +/∊nested → 9.7E¯6 | -71% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
cmpx '∊+\nested' '+\∊nested'
∊+\nested → 1.6E¯2 | 0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
+\∊nested → 1.6E¯5 | -100%