//! Current-time-since-epoch helpers.
//!
//! Many sites need "seconds / millis / nanos since the Unix epoch" for
//! timestamps, cache keys, and unique-id seeds, and hand-rolled
//! `SystemTime::now().duration_since(UNIX_EPOCH).map(|d| d.as_*()).unwrap_or(0)`
//! ~30 times with subtle variation. These centralize it; the `.unwrap_or(0)`
//! saturates the only failure case (a system clock set before 1970), which
//! never happens in practice.
use ;
/// Whole seconds since the Unix epoch (0 if the clock predates the epoch).
/// Nanoseconds since the Unix epoch — a monotonic-ish unique seed for
/// ids / temp filenames.