Use str.translate to improve performance of normalize
#1090
| Job | Run time |
|---|---|
| 1m 25s | |
| 53s | |
| 2m 2s | |
| 4m 50s | |
| 3m 43s | |
| 1m 13s | |
| 1m 28s | |
| 1m 15s | |
| 1m 39s | |
| 1m 48s | |
| 1m 28s | |
| 1m 23s | |
| 3m 32s | |
| 2s | |
| 0s | |
| 26m 41s |