threads_spec.rb

  it 'should work faster using ranges in threads on aggregate' do
    Report1 = Class.new do
      include Mongoid::Report

      report 'example' do
        attach_to Model do
          group_by :day
          column :field1
        end
      end
    end

    Report2 = Class.new do
      include Mongoid::Report

      report 'example' do
        attach_to Model do
          group_by :day
          perform_using groups: 5, by: :day
          column :field1
        end
      end
    end

    5.times do |i|
      10000.times { klass.create!(day: i.days.ago, field1: 1) }
    end

    time1 = Benchmark.measure do
      rows = scoped.ranges(day: (0.days.ago..5.days.from_now)).all
    end

    time2 = Benchmark.measure do
      rows = scoped.all
    end

    puts time2
    puts time1

    time2.real.should > time1.real
  end