The ratio over interpreted performancce is computed as r in the below table:
| Maximum Depth (n=10) | Pushes (n=10) | Maximum Depth (n=15) | Pushes (n=15) | Maximum Depth (n=20) | Pushes (n=20) | |
|---|---|---|---|---|---|---|
| Interpreted | 53 | 4944 | 78 | 55232 | 103 | 612936 |
| Special-purpose | 18 (r=.34) | 352 (r=.07) | 28 (r=.36) | 3944 (r=.07) | 38 (r=.37) | 43780 (r=.07) |
| Compiled (w/ open coding) | 21 (r=.39) | 974 (r=.20) | 31 (r=.40) | 10852 (r=.20) | 41 (r=.40) | 120401 (r=.20) |
The special-purpose machine heavily outperforms the compiled program in this case.
The compiled procedure has:
- pushes: pushes(n-1) + pushes(n-2) + 5, pushes(0) = 6, pushes(1) = 6
- depth: 2n + 1
The specal-purpose procedure has:
- pushes: pushes(n-1) + pushes(n-2) + 40, pushes(0) = 16, pushes(1) = 16
- depth: 5*n + 3