import Dispatch
import Foundation
struct MonotonicTimer: Sendable {
private let startedAtNanoseconds: UInt64
init() {
startedAtNanoseconds = DispatchTime.now().uptimeNanoseconds
}
var elapsedSeconds: TimeInterval {
let now = DispatchTime.now().uptimeNanoseconds
guard now >= startedAtNanoseconds else { return 0 }
return TimeInterval(now - startedAtNanoseconds) / 1_000_000_000
}
}