ActiveModel vs dry-validation

require 'benchmark/ips'
require 'active_model'
require 'dry-validation'
require 'dry/schema/version'

GOOD_INPUTS = [
  { name: 'Tom', age: 904 },
  { name: 'Piotr', age: nil },
  { name: 'Dane', age: 44, password: 'wigwam' },
]

BAD_INPUTS = [
  { name: nil, age: nil }, # nil not allowed for name
  { name: 'Tom', age: 'hello' }, # string not allowed for age
  { }, # all keys missing
]

class ActivePerson
  include ActiveModel::Model

  attr_accessor :name, :age, :password

  validates_presence_of :name
  validates_numericality_of :age, only_integer: true, allow_nil: true
end

class DryPerson < Dry::Validation::Contract
  schema do
    required(:name).value(:string)
    required(:age).maybe(:integer)
  end
end

def validate_inputs
  GOOD_INPUTS.each do |input|
    yield(input)
  end

  BAD_INPUTS.each do |input|
    yield(input)
  end
end

def title(str)
  str.rjust(25)
end

Benchmark.ips do |x|
  x.report(title("ActiveModel #{ActiveModel::VERSION::STRING}")) do
    validate_inputs { |input| ActivePerson.new(input).valid? }
  end

  x.report(title("dry-schema, Params, #{Dry::Schema::VERSION}")) do
    validate_inputs { |input| DryPerson.new.(input) }
  end

  x.compare!
end