each_vs_reduce.rb

# report for each
#  0.010811   0.001804   0.012615 (  0.013084)
# report for reduce
#  0.007351   0.001876   0.009227 (  0.009232)

n=1000000
Benchmark.bm do |x|

  x.report do
    puts "report for each"
    {}.tap do |metrics|
      Sidekiq::DeadSet.new.each do |job|
        metrics[job.klass] ||= 0
        metrics[job.klass] += 1
      end
    end.sort_by { |key, value| -value }.to_h
  end

  x.report do
    puts "report for reduce"
    Sidekiq::DeadSet.new.reduce({}) do |acc, job|
      acc[job.klass] = 0 unless acc[job.klass]
      acc.merge("#{job.klass}": acc[job.klass] + 1)
    end.sort_by { |key, value| -value }.to_h
  end
end