add implementation comment for ribbon #2763
| Job | Run time |
|---|---|
| 16m 56s | |
| 14m 17s | |
| 10m 52s | |
| 8m 16s | |
| 16m 49s | |
| 24m 5s | |
| 16m 44s | |
| 16m 27s | |
| 7m 4s | |
| 11m 33s | |
| 12m 50s | |
| 19m 11s | |
| 27m 22s | |
| 31m 21s | |
| 7m 44s | |
| 15m 52s | |
| 9m 5s | |
| 9m 50s | |
| 8m 29s | |
| 15m 2s | |
| 11m 55s | |
| 11m 34s | |
| 27m 55s | |
| 9m 9s | |
| 30m 28s | |
| 13m 56s | |
| 12m 14s | |
| 19m 12s | |
| 20m 3s | |
| 13m 3s | |
| 36m 56s | |
| 37m 3s | |
| 19m 32s | |
| 26m 43s | |
| 25m 20s | |
| 53m 51s | |
| 27s | |
| 11h 9m 10s |