Comparing ruby native's ERB, Eruby and Rails' tag builder

erb-vs-eruby-vs-tag.rb

require 'bundler/inline'

gemfile do
  source 'http://rubygems.org'

  gem 'benchable'
  gem 'rails'
  gem 'erubi'
end


require 'action_view'
# require 'eruby'

include ActionView::Helpers::TagHelper
include ERB::Util

def output_buffer=(s)
end

def output_buffer
end

def test_tag(cls)
  tag.aside(class: cls) do
    tag.section(class: cls) do  
      tag.article(class: cls) do
        tag.div(class: cls) do
          tag.p(class: cls) do
            tag.span(class: cls) do
              "body"
            end
          end
        end
      end
    end
  end
end

def test_erb(cls)
  b = binding
  erb = <<~ERB
    <aside class=<%= cls %> >
      <section class=<%= cls %> >
        <article class=<%= cls %> >
          <div class=<%= cls %> >
            <p class=<%= cls %> >
              "body"
            </p>
          </div>
        </article>
      </section>
    </aside>
  ERB
  ERB.new(erb).result(b)
end

def test_eruby(cls)
  erb = <<~ERB
    <aside class=<%= cls %> >
      <section class=<%= cls %> >
        <article class=<%= cls %> >
          <div class=<%= cls %> >
            <p class=<%= cls %> >
              "body"
            </p>
          </div>
        </article>
      </section>
    </aside>
  ERB
  eval Erubi::Engine.new(erb).src
end

Benchable.bench(:ips) do
  bench 'erb' do
    test_erb("txt-bold txt-md mx-auto my-2")
  end

  bench 'eruby' do
    test_eruby("txt-bold txt-md mx-auto my-2")
  end

  bench 'tag' do
    test_tag("txt-bold txt-md mx-auto my-2")
  end
end

Benchable.bench(:memory) do
  bench 'erb' do
    test_erb("txt-bold txt-md mx-auto my-2")
  end

  bench 'eruby' do
    test_eruby("txt-bold txt-md mx-auto my-2")
  end

  bench 'tag' do
    test_tag("txt-bold txt-md mx-auto my-2")
  end
end

# Benchmark IPS:
# Warming up --------------------------------------
#                  Erb     1.024k i/100ms
#                Eruby     1.506k i/100ms
#                  Tag     1.808k i/100ms
# Calculating -------------------------------------
#                  Erb     10.053k (± 4.0%) i/s -    200.704k in  20.004021s
#                Eruby     14.835k (± 5.5%) i/s -    296.682k in  20.082587s
#                  Tag     17.940k (± 6.7%) i/s -    357.984k in  20.083031s

# Benchmark Memory:
# Calculating -------------------------------------
#                  Erb     8.764k memsize (     0.000  retained)
#                        126.000  objects (     0.000  retained)
#                         47.000  strings (     0.000  retained)
#                Eruby     5.954k memsize (     0.000  retained)
#                         69.000  objects (     0.000  retained)
#                         27.000  strings (     0.000  retained)
#                  Tag    10.296k memsize (    40.000  retained)
#                        131.000  objects (     1.000  retained)
#                         17.000  strings (     0.000  retained)