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dist: trusty
sudo: required
addons:
  apt:
    sources:
      - sourceline: 'deb https://repo.percona.com/apt trusty main'
        key_url: 'https://keyserver.ubuntu.com/pks/lookup?search=0x9334A25F8507EFA5&op=get'
    packages:
      - percona-server-server-5.7
      - percona-server-client-5.7

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require 'benchmark/ips'

Benchmark.ips do |x|
  x.report("Kernel") { Hash(nil) }
  x.report("Hash")  { Hash.new(nil) }
end

# Warming up --------------------------------------
#               Kernel   307.226k i/100ms
#                 Hash   117.067k i/100ms

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# gem install benchmark-ips

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

puts RUBY_DESCRIPTION

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

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/*
!.gitignore
!ruby-build.sh

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module Tree
  # Returns list of ancestors, starting from parent until root.
  #
  #   subchild1.ancestors # => [child1, root]
  def ancestors
    node, nodes = self, []
    nodes << node = node.parent while node.parent
    nodes
  end

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require 'benchmark/ips'
require 'rack/utils'
require 'uri'
require 'cgi'

uri = URI.parse "https://reedsy.com/?foo=1&bar=2"

# [2.5.3] 0:(main) > Rack::Utils.parse_nested_query uri.query
# => {
#     "foo" => "1",

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To run benchmarks

1. Install lockless from https://locklessinc.com/downloads/ in lockless_allocator path make
2. Install Hoard from https://github.com/emeryberger/Hoard in Hoard and make
3. Run ruby make_jemallocs.rb
4. Run ruby make_tcmallocs.rb
5. Run ruby test_all.rb

Results:

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unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'stripe', '1.58.0'
    gem 'minitest'
  GEMFILE

  system 'bundle'
end

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unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    #gem 'rails', github: 'rails/rails'
    gem 'rails', github: 'rails/rails', branch: '4-2-stable'
    gem 'sqlite3'
  GEMFILE

  system 'bundle'
end

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require 'benchmark'

# sublime text as editor
Pry.config.editor = 'subl -w'

Pry.config.color = true
Pry.config.pager = true

# alias 'q' for 'exit'
Pry.config.commands.alias_command 'q', 'exit-all'