[medium-duration-threshold.html]
  [PerformanceObserver observes events according to its durationThreshold]
    expected:
      if (os == "linux") and not fission and debug and swgl: [PASS, FAIL]
      if (os == "linux") and not fission and debug and not swgl: [PASS, FAIL]
      if (os == "linux") and not fission and not debug: [PASS, FAIL]
      if (os == "mac") and debug: [PASS, FAIL]
