Exercise 8 Index   <<   >>


 

Run some benchmarks on x⍳y for general 4-byte integers and for small-range 4-byte integers. For example:


x y ← ↓u[?2 1e6⍴≢u←    ?8e5⍴2e9]  ⍝ general
s t ← ↓u[?2 1e6⍴≢u←2e9+?8e5⍴1e6]  ⍝ small-range
cmpx 'x⍳y' 's⍳t'





















   cmpx 'x⍳y' 's⍳t'
  x⍳y → 1.50e¯1 |   0% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕
* s⍳t → 5.96e¯2 | -61% ⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕⎕