in response to http://stackoverflow.com/posts/34446828

t.rb

require 'rufus-scheduler'

p [ RUBY_VERSION, RUBY_PLATFORM ]

s = Rufus::Scheduler.new

t0 = Time.now

total = 38_000

(total * 0.9).to_i.times do
  s.every('1h') {}
end
(total * 0.1).to_i.times do
  s.cron('* * * * *') {}
end

p Time.now - t0

# results on my OSX laptop:
#
# $ chruby
#    jruby-1.7.22
#    ruby-1.8.7-p374
#    ruby-1.9.3-p547
#    ruby-2.1.3
#
# $ chruby jruby
# $ bundle exec ruby t.rb
# ["1.9.3", "java"]
# 16.403
#
# $ chruby 1.9
# $ bundle exec ruby t.rb
# ["1.9.3", "x86_64-darwin14.5.0"]
# 37.218007
#
# $ chruby 2.1
# $ bundle exec ruby t.rb
# ["2.1.3", "x86_64-darwin14.0"]
# 13.670538