Benchmark psych vs yaml

bm__psych_yaml.rb

require 'benchmark/memory'
require 'memory_profiler'

require 'benchmark/ips'

require 'psych'
require 'yaml'

file = File.read('./devise.en.yml')

Benchmark.memory do |x|
  x.report('psych safe_load') { Psych.safe_load file }
  x.report('psych load') { Psych.load file }
  x.report('yaml load') { YAML.load file }

  x.compare!
end

Benchmark.ips do |x|
  x.report('psych safe_load') { Psych.safe_load file }
  x.report('psych load') { Psych.load file }
  x.report('yaml load') { YAML.load file }

  x.compare!
end

# ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-darwin19]
# Calculating -------------------------------------
#      psych safe_load    31.160k memsize (    22.000k retained)
#                        328.000  objects (   223.000  retained)
#                         50.000  strings (    50.000  retained)
#           psych load    28.822k memsize (    21.254k retained)
#                        294.000  objects (   215.000  retained)
#                         50.000  strings (    50.000  retained)
#            yaml load    28.822k memsize (    21.254k retained)
#                        294.000  objects (   215.000  retained)
#                         50.000  strings (    50.000  retained)

# Comparison:
#           psych load:      28822 allocated
#            yaml load:      28822 allocated - same
#      psych safe_load:      31160 allocated - 1.08x more
# Warming up --------------------------------------
#      psych safe_load   299.000  i/100ms
#           psych load   294.000  i/100ms
#            yaml load   298.000  i/100ms
# Calculating -------------------------------------
#      psych safe_load      2.743k (± 6.8%) i/s -     13.754k in   5.038117s
#           psych load      2.726k (± 6.2%) i/s -     13.818k in   5.089565s
#            yaml load      2.709k (± 5.5%) i/s -     13.708k in   5.075277s

# Comparison:
#      psych safe_load:     2742.7 i/s
#           psych load:     2725.8 i/s - same-ish: difference falls within error
#            yaml load:     2709.0 i/s - same-ish: difference falls within error

devise.en.yml

# Additional translations at https://github.com/plataformatec/devise/wiki/I18n

en:
  errors:
    messages:
      expired: "has expired, please request a new one"
      not_found: "not found"
      already_confirmed: "was already confirmed, please try signing in"
      not_locked: "was not locked"
      not_saved:
        one: "1 error prohibited this %{resource} from being saved:"
        other: "%{count} errors prohibited this %{resource} from being saved:"

  devise:
    failure:
      resource_not_found: 'This email address was not found'
      attempts_left: "Incorrect password! You have %{attempt_remaining} remaining"
      already_authenticated: 'You are already signed in.'
      unauthenticated: 'You need to sign in or sign up before continuing.'
      unconfirmed: 'You have to confirm your account before continuing.'
      locked: 'Your account is locked.'
      last_attempt: 'Your next unsuccessful login attempt will lock your account'
      retry: 'Oops! Try again.'
      invalid: 'Unsuccessful login, please try again'
      invalid_token: 'Invalid authentication token.'
      timeout: 'Your session expired, please sign in again to continue.'
      inactive: 'You do not have access to any organisation. Please contact [email protected] if you believe this to be a mistake.'
    sessions:
      signed_in: ''
      signed_out: ''
    passwords:
      send_instructions: 'You will receive an email with instructions about how to reset your password in a few minutes.'
      updated: 'Your password was changed successfully. You are now signed in.'
      updated_not_active: 'Your password was changed successfully.'
      send_paranoid_instructions: "If your e-mail exists on our database, you will receive a password recovery link on your e-mail"
    confirmations:
      send_instructions: 'You will receive an email with instructions about how to confirm your account in a few minutes.'
      send_paranoid_instructions: 'If your e-mail exists on our database, you will receive an email with instructions about how to confirm your account in a few minutes.'
      confirmed: 'Your account was successfully confirmed. You are now signed in.'
    unlocks:
      send_instructions: 'You will receive an email with instructions about how to unlock your account in a few minutes.'
      unlocked: 'Your account has been unlocked successfully. Please sign in to continue.'
      send_paranoid_instructions: 'If your account exists, you will receive an email with instructions about how to unlock it in a few minutes.'
    omniauth_callbacks:
      success: 'Successfully authorized from %{kind} account.'
      failure: 'Could not authorize you from %{kind} because "%{reason}".'
    mailer:
      confirmation_instructions:
        subject: 'Confirmation instructions'
      reset_password_instructions:
        subject: 'Reset password instructions'
      unlock_instructions:
        subject: 'Unlock Instructions'