       return ns.description + " ns"
   }
   
-  public var interval: CFTimeInterval
+  public var interval: NSTimeInterval
   {
     return Double(ns)*1e-9
   }

    ns = Int64(nanoseconds)
  }

  init(seconds: CFTimeInterval)
  {
    ns = Int64(seconds*1e9)
  }


import Darwin.Mach.mach_time
import Darwin.C.time
import Foundation.NSDate
import QuartzCore

/**
  A struct whose purpose is to pretty-print short durations of time.
