ruby Digest::* benchmark

bench-digest.rb

# gem install benchmark-ips

require 'digest/sha1'
require 'digest/sha2'
require 'benchmark/ips'

puts RUBY_DESCRIPTION

SRC = File.read '/dev/urandom', 8192

Benchmark.ips do |x|
  x.report('MD5')    { Digest::MD5.hexdigest    SRC }
  x.report('SHA1')   { Digest::SHA1.hexdigest   SRC }
  x.report('SHA2')   { Digest::SHA2.hexdigest   SRC }
  x.report('SHA256') { Digest::SHA256.hexdigest SRC }
end

ruby 2.5.5p157

ruby 2.5.5p157 (2019-03-15 revision 67260) [x86_64-darwin18]
Warming up --------------------------------------
                 MD5     7.331k i/100ms
                SHA1     8.444k i/100ms
                SHA2     3.990k i/100ms
              SHA256     3.877k i/100ms
Calculating -------------------------------------
                 MD5     67.405k (± 5.0%) i/s -    337.226k in   5.015780s
                SHA1     82.200k (± 4.8%) i/s -    413.756k in   5.045244s
                SHA2     40.337k (± 4.5%) i/s -    203.490k in   5.054968s
              SHA256     40.364k (± 4.7%) i/s -    201.604k in   5.006960s