use_file: switch to futex on Linux and to nanosleep on other targets
#140
| Job | Run time |
|---|---|
| 2m 38s | |
| 12s | |
| 8s | |
| 2m 58s |
nanosleep on other targets
#140
| Job | Run time |
|---|---|
| 2m 38s | |
| 12s | |
| 8s | |
| 2m 58s |