i18n hash benchmark and results

benchmark.rb

#!/usr/bin/env ruby

require 'benchmark'
require 'digest'
require 'xxhash'

md5    = Digest::MD5.new
sha1   = Digest::SHA1.new
rmd160 = Digest::RMD160.new
sha256 = Digest::SHA256.new
sha384 = Digest::SHA384.new
sha512 = Digest::SHA512.new

c_md5    = Digest::MD5
c_sha1   = Digest::SHA1
c_rmd160 = Digest::RMD160
c_sha256 = Digest::SHA256
c_sha384 = Digest::SHA384
c_sha512 = Digest::SHA512

seed   = 16_777_213
key    = 'a' * 100

Benchmark.bm(15) do |b|
  b.report("Object#hash") do
    10_000.times do
      "i18n/en/#{key.hash}"
    end
  end
  b.report("xxhash") do
    10_000.times do
      "i18n/en/#{XXhash.xxh32(key,16777213)}"
    end
  end
  b.report("md5") do
    10_000.times do
      "i18n/en/#{md5.hexdigest(key)}"
    end
  end
  b.report("sha1") do
    10_000.times do
      "i18n/en/#{sha1.hexdigest(key)}"
    end
  end
  b.report("rmd160") do
    10_000.times do
      "i18n/en/#{rmd160.hexdigest(key)}"
    end
  end
  b.report("sha256") do
    10_000.times do
      "i18n/en/#{sha256.hexdigest(key)}"
    end
  end
  b.report("sha384") do
    10_000.times do
      "i18n/en/#{sha384.hexdigest(key)}"
    end
  end
  b.report("sha512") do
    10_000.times do
      "i18n/en/#{sha512.hexdigest(key)}"
    end
  end
  b.report("md5 - class")    { 10_000.times { "i18n/en/#{c_md5.hexdigest(key)}" } }
  b.report("sha1 - class")   { 10_000.times { "i18n/en/#{c_sha1.hexdigest(key)}" } }
  b.report("rmd160 - class") { 10_000.times { "i18n/en/#{c_rmd160.hexdigest(key)}" } }
  b.report("sha256 - class") { 10_000.times { "i18n/en/#{c_sha256.hexdigest(key)}" } }
  b.report("sha384 - class") { 10_000.times { "i18n/en/#{c_sha384.hexdigest(key)}" } }
  b.report("sha512 - class") { 10_000.times { "i18n/en/#{c_sha512.hexdigest(key)}" } }
end

results.sh

$ ./benchmark.rb
                      user     system      total        real
Object#hash       0.010000   0.000000   0.010000 (  0.010129)
xxhash            0.000000   0.000000   0.000000 (  0.006071)
md5               0.010000   0.010000   0.020000 (  0.011946)
sha1              0.020000   0.000000   0.020000 (  0.014382)
rmd160            0.020000   0.000000   0.020000 (  0.021107)
sha256            0.020000   0.000000   0.020000 (  0.019214)
sha384            0.020000   0.000000   0.020000 (  0.018470)
sha512            0.020000   0.000000   0.020000 (  0.024694)
md5 - class       0.020000   0.000000   0.020000 (  0.025295)
sha1 - class      0.020000   0.000000   0.020000 (  0.019504)
rmd160 - class    0.030000   0.000000   0.030000 (  0.022158)
sha256 - class    0.020000   0.000000   0.020000 (  0.025232)
sha384 - class    0.030000   0.000000   0.030000 (  0.026837)
sha512 - class    0.030000   0.000000   0.030000 (  0.028532)

The 100 character key at L22 was chosen because that's the longest key length currently used privately. I figure that's a reasonable benchmark length as well.