private static DateTimeOffset GetNextCycleTargetTime(DateTimeOffset periodStart)
{
// Next tick: (current time rounded down to MINUTE start) + (1 minute) + (small sub-minute offset).
// The strategy here is to always "tick" at the same offset within a minute.
// Due to drift and inprecize timing this may conflict with the aggregation being exactly a minute.
// In such cases we err on the side of keeping the same offset.
// This will tend to straighten out the inmterval and to yield consistent timestamps.
const int targetOffsetFromRebasedCurrentTimeInSecs = 60 + 1;
const double minPeriodInSecs = 20.0 + 1.0;
DateTimeOffset target = Util.RoundDownToMinute(periodStart).AddSeconds(targetOffsetFromRebasedCurrentTimeInSecs);
// If this results in the next period being unreasonably short, we extend that period by 1 minute,
// resulting in a total period that is somewhat longer than a minute.
TimeSpan waitPeriod = target - periodStart;
if (waitPeriod.TotalSeconds < minPeriodInSecs)
{
target = target.AddMinutes(1);
}
return(target);
}