use getfield for performance and add performance tests #298
| Job | Run time |
|---|---|
| 8m 20s | |
| 7m 54s | |
| 12m 50s | |
| 12m 3s | |
| 24m 6s | |
| 22m 30s | |
| 7m 54s | |
| 7m 36s | |
| 12m 13s | |
| 11m 30s | |
| 12m 27s | |
| 11m 38s | |
| 8m 9s | |
| 7m 58s | |
| 11m 54s | |
| 11m 21s | |
| 12m 29s | |
| 12m 4s | |
| 8m 12s | |
| 7m 56s | |
| 12m 4s | |
| 11m 34s | |
| 12m 31s | |
| 11m 49s | |
| 4h 39m 2s |