Benchmark htauth gem to create md5 password

benchmark-md5.rb

require 'benchmark'
require 'open3'
require 'htauth/md5'

SALT = 

def run_open3
  Open3.popen3('htpasswd', '-nbm', 'username', 'password') { | stdin, stdout, stderr | stdout.read }.strip.split(':')[1]
end

def run_backtick
  `htpasswd -nbm username password`.strip.split(':')[1]
end

def run_hauth_dyn
  HTAuth::Md5.new.encode('password')
end

$md5 = HTAuth::Md5.new
def run_hauth_reuse
  $md5.encode('password')
end

n = 1000

Benchmark.bmbm do |x|
  x.report('Open3') { n.times { run_open3 } }
  x.report('Backtick') { n.times { run_backtick } }
  x.report('HTAuth (dynamic)')  { n.times { run_hauth_dyn } }
  x.report('HTAuth (reuse)')  { n.times { run_hauth_reuse } }
end

result-md5.txt

# ruby 2.1.3
# Mac OS X 10.9.5
# 2.7 GHz Intel Core i7 / 16 GB

Rehearsal ----------------------------------------------------
Open3              0.160000   0.510000   2.780000 (  2.696596)
Backtick           0.080000   0.370000   2.470000 (  2.488906)
HTAuth (dynamic)   2.200000   0.010000   2.210000 (  2.199498)
HTAuth (reuse)     2.140000   0.000000   2.140000 (  2.146822)
------------------------------------------- total: 9.600000sec

                       user     system      total        real
Open3              0.140000   0.560000   2.730000 (  2.661636)
Backtick           0.070000   0.390000   2.510000 (  2.536059)
HTAuth (dynamic)   2.180000   0.030000   2.210000 (  2.200213)
HTAuth (reuse)     2.100000   0.010000   2.110000 (  2.108569)