Hash Benchmarks

gistfile1.rb

#!/usr/bin/env ruby
require 'benchmark'
require 'digest'

n = 5_000_000
xruns = 10

puts <<-EOS
Hash Benchmarks
===============

Testing MD5, RMD160, SHA1, SHA256, SHA384, SHA512.

WARNING: Both MD5 and SHA1 are known to be insecure.

Running #{n} iterations per hashing method using string concating:

    Digest::HashMethod.hexstring(salt + mac)

Performing #{xruns} test runs:

EOS

runs = []
salt = 'eb693ec8252cd630102fd0d0fb7c3485'
mac = '7a0115f60a3c'
xruns.times do |index|
  puts "\n\nTest Run #{index + 1}"
  runs << Benchmark.bmbm(7){ |x|
    x.report("MD5")    { 1.upto(n){ Digest::MD5.hexdigest(salt + mac) } }
    x.report("RMD160") { 1.upto(n){ Digest::RMD160.hexdigest(salt + mac) } }
    x.report("SHA1")   { 1.upto(n){ Digest::SHA1.hexdigest(salt + mac) } }
    x.report("SHA256") { 1.upto(n){ Digest::SHA256.hexdigest(salt + mac) } }
    x.report("SHA384") { 1.upto(n){ Digest::SHA384.hexdigest(salt + mac) } }
    x.report("SHA512") { 1.upto(n){ Digest::SHA512.hexdigest(salt + mac) } }
  }
end

puts <<-EOS

Results
=======

WARNING: Both MD5 and SHA1 are known to be insecure.

Running #{n} iterations per hashing method using string concating:

    Digest::HashMethod.hexstring(salt + mac)

STATS
EOS

%w(MD5 RMD160 SHA1 SHA256 SHA384 SHA512).each_with_index do |hash_method, index|
  puts "\n#{hash_method}"
  hash_data = runs.map{|r| r[index]}
  [:utime, :stime, :total, :real].each do |metric|
    data = hash_data.map(&metric)
    puts "  #{metric.to_s.upcase}"
    puts "          min        max    average"
    printf("    %9f  %9f  %9f\n", data.min, data.max, (data.reduce(:+).to_f / data.size))
    printf("    %9f  %9f  %9f\n", data.min/n, data.max/n, (data.reduce(:+).to_f / data.size)/n)
  end
end