Don't assume that SubString has pointer and copy instead (#506)
#989
| Job | Run time |
|---|---|
| 3m 22s | |
| 1m 14s | |
| 2m 26s | |
| 2m 5s | |
| 2m 47s | |
| 6m 6s | |
| 4m 43s | |
| 2m 3s | |
| 2m 18s | |
| 2m 13s | |
| 2m 11s | |
| 1m 7s | |
| 2m 10s | |
| 1m 44s | |
| 1m 48s | |
| 10m 16s | |
| 9m 48s | |
| 1m 42s | |
| 1m 37s | |
| 1m 52s | |
| 2m 16s | |
| 1m 51s | |
| 1m 59s | |
| 3m 3s | |
| 2m 25s | |
| 3m 20s | |
| 2m 37s | |
| 2m 52s | |
| 3m 45s | |
| 3m 13s | |
| 3m 20s | |
| 2m 31s | |
| 3m 4s | |
| 3m 51s | |
| 3m 16s | |
| 1h 46m 55s |