benchmark_method_missing

test.rb

require "benchmark"

class ViewContext
  def hello
    "hello"
  end
end

class SimpleMethodMissing
  def initialize
    @view_context = ViewContext.new
  end

  def foo
    "bar"
  end

  def method_missing(method, *args, &block)
    @view_context.send method, *args, &block
  end
end

class FancyMethodMissing
  def initialize
    @view_context = ViewContext.new
  end

  def method_missing(method, *args, &block)
    self.class.define_proxy method
    send method, *args, &block
  end

  def self.define_proxy(name)
    define_method name do |*args, &block|
      @view_context.send(name, *args, &block)
    end
  end
end

def test(runs = 1_000_000)
  Benchmark.bm(8) do |x|
    x.report('direct:') { for i in 1..runs; SimpleMethodMissing.new.foo {}; end }
    x.report('simple:') { for i in 1..runs; SimpleMethodMissing.new.hello {}; end }
    x.report('fancy:') { for i in 1..runs; FancyMethodMissing.new.hello {}; end }
  end
end

test

### Results 2.1.5
#                user     system      total        real
# direct:    0.480000   0.000000   0.480000 (  0.481921)
# simple:    1.560000   0.010000   1.570000 (  1.566712)
# fancy:     1.650000   0.000000   1.650000 (  1.655674)

### Results 1.9.3
#                user     system      total        real
# direct:    1.020000   0.000000   1.020000 (  1.022496)
# simple:    2.860000   0.020000   2.880000 (  2.880711)
# fancy:     2.950000   0.020000   2.970000 (  2.972795)