#define_method vs ActiveSupport::StringInquirer

results.txt

Rehearsal ----------------------------------------------
#one?        0.000000   0.000000   0.000000 (  0.001843)
#one?        0.000000   0.000000   0.000000 (  0.002105)
#kind.one?   0.010000   0.000000   0.010000 (  0.005502)
------------------------------------- total: 0.010000sec

                 user     system      total        real
#one?        0.000000   0.000000   0.000000 (  0.002660)
#one?        0.000000   0.000000   0.000000 (  0.002275)
#kind.one?   0.000000   0.000000   0.000000 (  0.003826)

setup.rb

class A
  attr_accessor :kind

  def initialize
    self.kind = 'one'
  end

  def one?
    self.kind == kind.to_s
  end
end

class B
  attr_accessor :kind

  def initialize
    self.kind = 'one'
  end

  %w[one two three four five].each do |kind|
    define_method("#{kind}?") do
      self.kind == kind.to_s
    end
  end
end

class C
  attr_accessor :kind

  def initialize
    self.kind = ActiveSupport::StringInquirer.new('one')
  end
end



Benchmark.bmbm do |x|
  x.report('#one?') do
    1_000.times { A.new.one? }
  end

  x.report('#one?') do
    1_000.times { B.new.one? }
  end

  x.report('#kind.one?') do
    1_000.times { C.new.kind.one? }
  end
end