Sort and Sort_by for dates

sort_sort_by_dates.rb

require 'active_support/all'
require 'benchmark'

dates = []
5.times {
    dates << Time.at(rand * Time.now.to_i).utc
}

puts 'DESC SORT WITH COMPARATOR'
puts dates.sort {|x,y| y <=> x }

puts 'DESC SORT_BY'
puts dates.sort_by {|x| Time.now - x}

puts 'SORT_BY'
puts dates.sort_by {|x| x }


100000.times {
    dates << Time.at(rand * Time.now.to_i).utc
}

Benchmark.bm do |x|
  x.report('sort') { dates.sort {|x,y| y <=> x } }

  x.report('sort_by') { dates.sort_by {|x| Time.now - x } }
end