use_file: switch to futex on Linux and to nanosleep on other targets
#139
| Job | Run time |
|---|---|
| 12s | |
| 2m 37s | |
| 10s | |
| 2m 59s |
nanosleep on other targets
#139
| Job | Run time |
|---|---|
| 12s | |
| 2m 37s | |
| 10s | |
| 2m 59s |