vent.title] +=
        eventSelfTime;

      let timeIntersectionRatio = 0;
      if (event.duration > 0) {
        timeIntersectionRatio =
            rangeOfInterest.findExplicitIntersectionDuration(
                event.start, event.end) / event.duration;
      }

      // TODO(#3846): v8_runtime is being double counted.
      // TODO(#3846): v8_runtime slice name is wrong. It's 'stats'.
      // TODO(#4296): v8_runtime should not be added for cpu time.
      const v8Runtime = event.args['runtime-call-s