Determining the estimated completion of Delayed Jobs

time_remaining.rb

include ActionView::Helpers::DateHelper
def time_remaining
  start_count = Delayed::Job.count
  if start_count == 0
    rate = 0 
    start_time = Time.now
    time_remaining = distance_of_time_in_words(start_time, start_time)
  else
    sleep(10)
    end_count = Delayed::Job.count
    delta = end_count - start_count
    rate = delta.abs.to_f/10.0
    seconds_remaining = (end_count.to_f/rate).round
    estimated_completion = Time.now + seconds_remaining.seconds
    start_time = Time.now
    time_remaining = distance_of_time_in_words(start_time, estimated_completion)
  end 
  [rate, time_remaining]
end
time_remaining