 
   public struct Result {
     public let name: String
-    public let startAt: Date
-    public let endAt: Date
+    public let startAt: TimeInterval
+    public let endAt: TimeInterval
     public let time: TimeInterval
     public let threshold: TimeInterval?
     public let isThresholdExceeded: Bool


  open var threshold: TimeInterval?

  open var startAt: Date?

  open var endAt: Date?

  public let file: String
  public let function: String


    endAt = _endAt

    let time = _endAt - startAt

    let isThresholdExceeded: Bool

