How often do you deploy to Heroku?

average_deploy.rb

#!/usr/bin/env ruby

# Copyright 2015 Colin Bartlett, Inc.
# MIT Licensed: http://opensource.org/licenses/MIT

# Usage: ./average_deploy.rb your-heroku-app-name

require 'time'

dates = `heroku releases -n 50 -a #{ARGV[0]} | grep Deploy`
  .split("\n")
  .map { |s| s.match(/[\d]{4}\/[\d]{2}\/[\d]{2} [\d]{2}\:[\d]{2}\:[\d]{2}/).to_s }

seconds = dates.each.with_index.reduce([]) do |a,(d,i)|
  if i != dates.size-1
    a << Time.parse(d).to_i - Time.parse(dates[i+1]).to_i
  end
  a
end.instance_eval { reduce(:+) / size.to_f }

puts "Average time between deploys:"
puts "#{seconds.to_i} seconds"
puts "aka #{(seconds / 60).to_i} minutes"
puts "aka #{(seconds / 60 / 60).round(2)} hours"
puts "aka #{(seconds / 60 / 60 / 24).round(2)} days"
puts
puts "You deploy an average of #{ (1 / (seconds / 60 / 60 / 24)).round(2)} times per day"