include? vs. cover? vs. between?

include-vs-cover-vs-between.rb

require 'date'
require 'benchmark'

n = 1_000_000
start_date = Date.new(2012, 01, 01)
end_date   = Date.new(2012, 03, 01)
act_date   = Date.new(2012, 02, 01)

Benchmark.bm(10) do |x|
  x.report('include?') do
    n.times do
      (start_date..end_date).include? (act_date)
    end
  end
  x.report('cover?') do
    n.times do
      (start_date..end_date).cover? (act_date)
    end
  end
  x.report('between?') do
    n.times do
      act_date.between?(start_date, end_date)
    end
  end
end

output.txt

js@horadrim [~/Code] % ruby ./include-vs-cover-vs-between.rb  
                 user     system      total        real
include?    38.910000   0.130000  39.040000 ( 40.826650)
cover?       1.100000   0.000000   1.100000 (  1.147182)
between?     0.630000   0.010000   0.640000 (  0.642790)