 }
 #endif
 
-class SampleRunner {
+final class SampleRunner {
   let timer = Timer()
   let baseline = SampleRunner.getResourceUtilization()
   let c: TestConfig

  }
}
#else
class Timer {
  typealias TimeT = UInt64
  var info = mach_timebase_info_data_t(numer: 0, denom: 0)
  init() {

#endif

#if os(Linux)
final class Timer {
  typealias TimeT = timespec
  func getTime() -> TimeT {
    var ticks = timespec(tv_sec: 0, tv_nsec: 0)
