This benchmark compares compilation time of class with N method vs. time to compile class and N single-method extensions in Swift.
rake benchmark
On my machine (Macbook Pro 15'' 2017) it produces the following results:
| n | methods | extensions |
|---|---|---|
| 100 | 0,55 | 0,3133 |
| 1000 | 2,07 | 2,1967 |
| 2000 | 4,1533 | 4,46 |
| 3000 | 6,2867 | 6,9467 |
| 5000 | 10,7267 | 12,71 |
| 10000 | 23,64 | 38,2133 |