properly guard {Process|Thread}Executor implementations
#19127
| Job | Run time |
|---|---|
| 4m 45s | |
| 1m 10s | |
| 5m 55s |
{Process|Thread}Executor implementations
#19127
| Job | Run time |
|---|---|
| 4m 45s | |
| 1m 10s | |
| 5m 55s |