properly guard {Process|Thread}Executor implementations
#19128
| Job | Run time |
|---|---|
| 1m 18s | |
| 4m 40s | |
| 5m 58s |
{Process|Thread}Executor implementations
#19128
| Job | Run time |
|---|---|
| 1m 18s | |
| 4m 40s | |
| 5m 58s |