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# /tmp/test = EBS-SSD
# /ephemeral/test = instance-store

[root@ip-172-31-26-72 ec2-user]# dd bs=1M count=1024 if=/dev/zero of=/ephemeral/test
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 3.15671 s, 340 MB/s
[root@ip-172-31-26-72 ec2-user]# dd bs=1M count=1024 if=/dev/zero of=/ephemeral/test
1024+0 records in
1024+0 records out

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# lib/strategies/authentication_token_strategy.rb
class AuthenticationTokenStrategy < ::Warden::Strategies::Base
  def valid?
    authentication_token
  end

  def authenticate!
    user = User.find_by_authentication_token(authentication_token)
    user.nil? ? fail!('strategies.authentication_token.failed') : success!(user)
  end

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require 'benchmark/ips'
require 'securerandom'
require 'digest'

NUMBER = 10_000

id_array = Array.new(NUMBER) { SecureRandom.uuid }.freeze

def slow(array)
  Digest::MD5.hexdigest(array.join('/'))

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# ruby 2.3.3p222
                  user     system      total        real
YAML         31.860000   0.000000  31.860000 ( 31.886926)
JSON          1.370000   0.000000   1.370000 (  1.374081)
Marshal       0.710000   0.000000   0.710000 (  0.711384)
MessagePack   0.510000   0.000000   0.510000 (  0.505674)

# jruby 9.1.7.0 (2.3.1)
                  user     system      total        real
YAML         26.270000   0.040000  26.310000 ( 25.652204)

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# EditorConfig helps developers define and maintain consistent
# coding styles between different editors and IDEs
# http://editorconfig.org

root = true

[*]
indent_style = space
indent_size = 2
end_of_line = lf

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# EditorConfig helps developers define and maintain consistent
# coding styles between different editors and IDEs
# http://editorconfig.org

root = true

[*]
indent_style = space
indent_size = 2
end_of_line = lf

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∫ ruby serialize_bench.rb 
Rehearsal -------------------------------------------
json      0.170000   0.010000   0.180000 (  0.174912)
yaml      6.350000   0.000000   6.350000 (  6.353721)
marshal   0.170000   0.000000   0.170000 (  0.171184)
bson      0.210000   0.000000   0.210000 (  0.213753)
yajl      0.130000   0.000000   0.130000 (  0.130591)
oj        0.080000   0.000000   0.080000 (  0.075798)
eval      0.370000   0.000000   0.370000 (  0.370350)
---------------------------------- total: 7.490000sec

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---

1. Summary
2. Reference
3. Acceptance Criteria

---

Summary

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#!/usr/bin/env bash
apt-get -y update
apt-get -y install build-essential zlib1g-dev libssl-dev libreadline6-dev libyaml-dev
cd /tmp
wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p327.tar.gz
tar -xvzf ruby-1.9.3-p327.tar.gz
cd ruby-1.9.3-p327/
./configure --prefix=/usr/local
make
make install

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clientSideValidations.formBuilders["FormtasticBootstrap::FormBuilder"] = {
  add: function (element, settings, message) {
    if (element.data('valid') !== false) {
      element.data('valid', false);
      var $parent = element.closest('.controls');
      $parent.parent().addClass('error');
      $('<span/>').addClass('help-inline').text(message).appendTo($parent);
    } else {
      element.parent().find('span.help-inline').text(message);
    }