Sorting & Searching: Grade vs. Sort Index   <<   >>

 
   x←¯1e9+?1e6⍴2e9

   cmpx '⍋x' '{⍵[⍋⍵]}x'
  ⍋x       → 1.48E¯1 |   0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
* {⍵[⍋⍵]}x → 5.56E¯2 | -63% ⎕⎕⎕⎕⎕⎕⎕⎕

              grade      sort    ratio
4-byte int   1.48e¯1   5.56e¯2    2.7
2-byte int   3.22e¯2   5.36e¯3    6.0
1-byte int   6.35e¯3   2.02e¯3    3.1
double       2.87e¯1   8.79e¯2    3.3
2-byte char  3.22e¯2   5.61e¯3    5.7
1-byte char  5.92e¯3   2.01e¯3    2.9