1 pub type Instant = std::time::Instant; 2 pub type SystemTime = std::time::SystemTime; 3 4 /// The current time, expressed in milliseconds since the Unix Epoch. now() -> f645pub fn now() -> f64 { 6 std::time::SystemTime::now().duration_since(std::time::SystemTime::UNIX_EPOCH) 7 .expect("System clock was before 1970.") 8 .as_secs_f64() * 1000.0 9 } 10