extract: write output asynchronously using a background thread per extract #264
| Job | Run time |
|---|---|
| 10m 9s | |
| 9m 7s | |
| 12m 13s | |
| 4m 34s | |
| 4m 53s | |
| 4m 17s | |
| 12m 35s | |
| 12m 33s | |
| 10m 7s | |
| 11m 6s | |
| 10m 35s | |
| 11m 14s | |
| 11m 48s | |
| 12m 42s | |
| 11m 2s | |
| 10m 32s | |
| 9m 46s | |
| 11m 9s | |
| 9m 59s | |
| 9m 29s | |
| 15m 29s | |
| 9m 16s | |
| 9m 33s | |
| 8m 52s | |
| 9m 54s | |
| 7m 58s | |
| 4h 20m 52s |