dry-validation vs activemodel

am_dry_validation_1.rb

require 'benchmark/ips'
require 'active_model'
require 'virtus'
require 'dry-validation'
require 'dry/validation/schema/form'

class User
  include ActiveModel::Validations
  include Virtus.model

  attribute :email, String
  attribute :age, Integer

  validates :email, :age, presence: true
  validates :age, numericality: { greater_than: 18 }
end

class UserFormSchema < Dry::Validation::Schema::Form
  key(:email) { |value| value.filled? }
  key(:age) { |value| value.int? & value.gt?(18) }
end

schema = UserFormSchema.new
params = { 'email' => '', 'age' => '18' }

Benchmark.ips do |x|
  x.report('ActiveModel::Validations + Virtus') do
    User.new(params).validate
  end

  x.report('dry-validation') do
    schema.(params)
  end

  x.compare!
end

am_no_virtus_full_messages.rb

require 'benchmark/ips'
require 'active_model'
require 'virtus'
require 'dry-validation'
require 'dry/validation/schema/form'

class User
  include ActiveModel::Validations

  attr_reader :email, :age

  validates :email, :age, presence: true
  validates :age, numericality: { greater_than: 18 }

  def initialize(attrs)
    @email, @age = attrs.values_at('email', 'age')
  end
end

class UserFormSchema < Dry::Validation::Schema::Form
  key(:email) { |value| value.filled? }
  key(:age) { |value| value.int? & value.gt?(18) }
end

schema = UserFormSchema.new
params = { 'email' => '', 'age' => '18' }

Benchmark.ips do |x|
  x.report('ActiveModel::Validations') do
    User.new(params).validate
  end

  x.report('dry-validation') do
    schema.messages(params)
  end

  x.compare!
end

result_1.txt

Calculating -------------------------------------
ActiveModel::Validations + Virtus
                       145.000  i/100ms
      dry-validation     6.527k i/100ms
-------------------------------------------------
ActiveModel::Validations + Virtus
                          1.499k (± 2.6%) i/s -      7.540k
      dry-validation     71.432k (± 2.9%) i/s -    358.985k

Comparison:
      dry-validation:    71431.6 i/s
ActiveModel::Validations + Virtus:     1499.3 i/s - 47.64x slower

result_2.txt

Calculating -------------------------------------
ActiveModel::Validations
                       169.000  i/100ms
      dry-validation     2.417k i/100ms
-------------------------------------------------
ActiveModel::Validations
                          1.723k (± 3.0%) i/s -      8.619k
      dry-validation     25.298k (± 3.5%) i/s -    128.101k

Comparison:
      dry-validation:    25298.0 i/s
ActiveModel::Validations:     1723.2 i/s - 14.68x slower