use_file: switch to futex on Linux and to nanosleep on other targets
#141
| Job | Run time |
|---|---|
| 5s | |
| 2m 37s | |
| 15s | |
| 2m 57s |
nanosleep on other targets
#141
| Job | Run time |
|---|---|
| 5s | |
| 2m 37s | |
| 15s | |
| 2m 57s |