use_file: switch to futex on Linux and to nanosleep on other targets
#179
| Job | Run time |
|---|---|
| 2m 54s | |
| 13s | |
| 11s | |
| 3m 18s |
nanosleep on other targets
#179
| Job | Run time |
|---|---|
| 2m 54s | |
| 13s | |
| 11s | |
| 3m 18s |