[sys_getloadavg 获取系统的负载](sys_getloadavg%E8%8E%B7%E5%8F%96%E7%B3%BB%E7%BB%9F%E7%9A%84%E8%B4%9F%E8%BD%BD.md) [hrtime 微妙时间戳](%E6%9D%82%E9%A1%B9%E5%87%BD%E6%95%B0/hrtime%E5%BE%AE%E5%A6%99%E6%97%B6%E9%97%B4%E6%88%B3.md) [ignore_user_abort](%E6%9D%82%E9%A1%B9%E5%87%BD%E6%95%B0/ignore_user_abort.md) [uniqid](%E6%9D%82%E9%A1%B9%E5%87%BD%E6%95%B0/uniqid.md) [sleep/usleep](%E6%9D%82%E9%A1%B9%E5%87%BD%E6%95%B0/sleep-usleep.md)