Migrate host_task object management to a thread pool based approach
#6466
| Job | Run time |
|---|---|
| 7m 38s | |
| 8m 11s | |
| 7m 48s | |
| 6m 5s | |
| 6m 46s | |
| 5m 24s | |
| 8m 19s | |
| 9m 50s | |
| 6m 30s | |
| 5m 16s | |
| 8m 51s | |
| 5m 30s | |
| 5m 38s | |
| 5m 23s | |
| 3m 11s | |
| 3m 51s | |
| 3m 1s | |
| 3m 48s | |
| 3m 39s | |
| 2m 53s | |
| 3m 31s | |
| 3m 20s | |
| 3m 28s | |
| 3m 32s | |
| 3m 23s | |
| 3m 51s | |
| 0s | |
| 0s | |
| 0s | |
| 2h 18m 37s |