CoachThe path inflation of a route between two places is its measured round trip divided by the round trip light would need along the geodesic in the route’s medium (for long-haul networks, fibre): chapter 10’s route factor, for round trips over networks whose medium and path are not published.
| From Tokyo to | Geodesic | Vacuum | Fibre | Backbone | Specialist | Path inflation | |
| (km) | RTT (ms) | RTT (ms) | (ms) | (ms) | backbone | specialist | |
| Hong Kong | 2 883 | 19.2 | 28.1 | – | – | – | – |
| Singapore | 5 311 | 35.4 | 51.8 | 68.0 | 65.4 | 1.31 | 1.26 |
| N. Virginia | 10 895 | 72.7 | 106.3 | 150.2 | 135.4 | 1.41 | 1.27 |
| Frankfurt | 9 359 | 62.4 | 91.3 | 224.3 | 136.5 | 2.46 | 1.50 |
| London | 9 586 | 64.0 | 93.5 | 210.0 | 139.6 | 2.25 | 1.49 |
| Stockholm | 8 194 | 54.7 | 79.9 | 245.3 | 124.3 | 3.07 | 1.56 |
nw_race.hub_rows().
fig_race.py, Table 19.1.