event_start = e.start_datetime
      event_end = e.end_datetime
      stats[i][:starts] += 1

      stats.drop(i).each do |r|
        next if event_start >= event_end

        event_exceeds_reading = event_end > (r[:datetime] + group_by_interval)
        event_preceeds_reading = event_start < r[:datetime]
        runtime = 0

        if(event_preceeds_reading)
          runtime = r[:datetime] - event_start
        elsif(event_exceeds_reading)
          runtime = (r[:datetime] + group_by_interval) - event_start
        else
          runtime = event_end - event_start
        end

        r[:runtime] += (runtime / 60).round
        event_start += runtime
      end


#VS
      event_start = e.start_datetime
      event_end = e.end_datetime
      stats[i][:starts] += 1

      stats.drop(i).each do |r|
        start_t = event_start < r[:datetime] ? r[:datetime] : event_start
        end_t = event_end > (r[:datetime] + group_by_interval) ? r[:datetime] + group_by_interval : event_end
        runtime = end_t - start_t
        r[:runtime] += (runtime / 60).round if runtime >= 0
      end