/// Paired with `latency_end` to record elapsed time for a certain type of fop.
Paired with `latency_end` to record elapsed time for a certain type of fop.
Paired with ` latency_end ` to record elapsed time for a certain type of fop .
pub fn latency_start(&self) -> Option<SystemTime> {
        if !self.measure_latency.load(Ordering::Relaxed) {
            return None;
        }
        Some(SystemTime::now())
    }
pub fn latency_start ( & self ) -> Option < SystemTime > { if ! self . measure_latency . load ( Ordering :: Relaxed ) { return None ; } Some ( SystemTime :: now ( ) ) }
Paired with `latency_end` to record elapsed time for a certain type of fop.
Paired with ` latency_end ` to record elapsed time for a certain type of fop .
&self