c.rb

require 'bundler'
Bundler.require
require 'json'
require 'zlib'
require 'base64'
require 'rbconfig'
ext = '.' + RbConfig::CONFIG['DLEXT']

iseqs = {}
$LOADED_FEATURES
  .reject { |loaded_feature| loaded_feature.end_with? ext }
  .select { |loaded_feature| File.exist? loaded_feature }.each { |loaded_feature|
  iseqs[loaded_feature] = Base64.strict_encode64 RubyVM::InstructionSequence.compile_file(loaded_feature).to_binary
}
File.binwrite 'packed.iseqs', JSON.dump(iseqs)
File.binwrite 'packed.iseqs.gz', Zlib.deflate(JSON.dump(iseqs))

d.rb

require 'json'
require 'zlib'
require 'base64'

ISEQZ = JSON.parse(Zlib.inflate(File.binread 'packed.iseqs.gz')).map { |k, v|
  [k, RubyVM::InstructionSequence.load_from_binary(Base64.strict_decode64(v))]
}.to_h
class RubyVM::InstructionSequence
  def self.load_iseq(fname)
    #puts fname
    ISEQZ.delete fname
  end
end

require 'bundler'
Bundler.require
require 'digest/sha1'
puts Digest::SHA1.hexdigest $LOADED_FEATURES.sort.join(',')

e.rb

require 'json'
require 'zlib'
require 'base64'

require 'bundler'
Bundler.require
require 'digest/sha1'
puts Digest::SHA1.hexdigest $LOADED_FEATURES.sort.join(',')

Gemfile

source 'https://rubygems.org'

gem 'rails', '~> 4.2.0'
gem 'pry-byebug'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    actionmailer (4.2.5)
      actionpack (= 4.2.5)
      actionview (= 4.2.5)
      activejob (= 4.2.5)
      mail (~> 2.5, >= 2.5.4)
      rails-dom-testing (~> 1.0, >= 1.0.5)
    actionpack (4.2.5)
      actionview (= 4.2.5)
      activesupport (= 4.2.5)
      rack (~> 1.6)
      rack-test (~> 0.6.2)
      rails-dom-testing (~> 1.0, >= 1.0.5)
      rails-html-sanitizer (~> 1.0, >= 1.0.2)
    actionview (4.2.5)
      activesupport (= 4.2.5)
      builder (~> 3.1)
      erubis (~> 2.7.0)
      rails-dom-testing (~> 1.0, >= 1.0.5)
      rails-html-sanitizer (~> 1.0, >= 1.0.2)
    activejob (4.2.5)
      activesupport (= 4.2.5)
      globalid (>= 0.3.0)
    activemodel (4.2.5)
      activesupport (= 4.2.5)
      builder (~> 3.1)
    activerecord (4.2.5)
      activemodel (= 4.2.5)
      activesupport (= 4.2.5)
      arel (~> 6.0)
    activesupport (4.2.5)
      i18n (~> 0.7)
      json (~> 1.7, >= 1.7.7)
      minitest (~> 5.1)
      thread_safe (~> 0.3, >= 0.3.4)
      tzinfo (~> 1.1)
    arel (6.0.3)
    builder (3.2.2)
    byebug (8.2.1)
    coderay (1.1.0)
    concurrent-ruby (1.0.0)
    erubis (2.7.0)
    globalid (0.3.6)
      activesupport (>= 4.1.0)
    i18n (0.7.0)
    json (1.8.3)
    loofah (2.0.3)
      nokogiri (>= 1.5.9)
    mail (2.6.3)
      mime-types (>= 1.16, < 3)
    method_source (0.8.2)
    mime-types (2.99)
    mini_portile2 (2.0.0)
    minitest (5.8.3)
    nokogiri (1.6.7.1)
      mini_portile2 (~> 2.0.0.rc2)
    pry (0.10.3)
      coderay (~> 1.1.0)
      method_source (~> 0.8.1)
      slop (~> 3.4)
    pry-byebug (3.3.0)
      byebug (~> 8.0)
      pry (~> 0.10)
    rack (1.6.4)
    rack-test (0.6.3)
      rack (>= 1.0)
    rails (4.2.5)
      actionmailer (= 4.2.5)
      actionpack (= 4.2.5)
      actionview (= 4.2.5)
      activejob (= 4.2.5)
      activemodel (= 4.2.5)
      activerecord (= 4.2.5)
      activesupport (= 4.2.5)
      bundler (>= 1.3.0, < 2.0)
      railties (= 4.2.5)
      sprockets-rails
    rails-deprecated_sanitizer (1.0.3)
      activesupport (>= 4.2.0.alpha)
    rails-dom-testing (1.0.7)
      activesupport (>= 4.2.0.beta, < 5.0)
      nokogiri (~> 1.6.0)
      rails-deprecated_sanitizer (>= 1.0.1)
    rails-html-sanitizer (1.0.2)
      loofah (~> 2.0)
    railties (4.2.5)
      actionpack (= 4.2.5)
      activesupport (= 4.2.5)
      rake (>= 0.8.7)
      thor (>= 0.18.1, < 2.0)
    rake (10.4.2)
    slop (3.6.0)
    sprockets (3.5.2)
      concurrent-ruby (~> 1.0)
      rack (> 1, < 3)
    sprockets-rails (3.0.0)
      actionpack (>= 4.0)
      activesupport (>= 4.0)
      sprockets (>= 3.0.0)
    thor (0.19.1)
    thread_safe (0.3.5)
    tzinfo (1.2.2)
      thread_safe (~> 0.1)

PLATFORMS
  ruby

DEPENDENCIES
  pry-byebug
  rails (~> 4.2.0)

BUNDLED WITH
   1.11.2

result

∴ ruby c.rb
∴ ll
total 33128
-rw-r--r--  1 miyucy  staff        72 12 26 02:27 Gemfile
-rw-r--r--  1 miyucy  staff      2811 12 26 02:28 Gemfile.lock
-rw-r--r--  1 miyucy  staff      2244 12 26 09:15 c.rb
-rw-r--r--  1 miyucy  staff       440 12 26 09:17 d.rb
-rw-r--r--  1 miyucy  staff       164 12 26 09:18 e.rb
-rw-r--r--  1 miyucy  staff  14409118 12 26 09:20 packed.iseqs
-rw-r--r--  1 miyucy  staff   2522469 12 26 09:20 packed.iseqs.gz

∴ time ruby e.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby e.rb  0.86s user 0.21s system 52% cpu 2.055 total
∴ time ruby e.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby e.rb  0.87s user 0.21s system 52% cpu 2.067 total
∴ time ruby e.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby e.rb  0.87s user 0.21s system 52% cpu 2.072 total

∴ time ruby d.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby d.rb  0.72s user 0.20s system 48% cpu 1.909 total
∴ time ruby d.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby d.rb  0.71s user 0.20s system 48% cpu 1.891 total
∴ time ruby d.rb
1ac18b57f8fe694eba31291d609ef380e979d083
ruby d.rb  0.71s user 0.20s system 48% cpu 1.905 total