biti/haml_vs_erb_vs_erubis.rb

## haml_vs_erb_vs_erubis.rb
# encoding: utf-8
require 'rubygems'
require 'haml'
require 'erb'
require 'erubis'

notes = []
20.times { notes << {:title => "标题标题", :content => "内容，内容"} }

obj = {
  :title => '笔记本首页',
  :description => '笔记本' * 100,
  :notes => notes
}


haml_template = <<EOF
!!!
%html
  %head
    %title= obj[:title]
  %body
    #top
      %h1= obj[:title]
    #main
      %p= obj[:description]

      %ul
        - obj[:notes].each do |note|
          %li= note[:title]
          %li= note[:content]
    #foot
      copy right
EOF

erb_template = <<EOF
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html>
  <head><title><%= obj[:title] %></title></head>
  <body>
    <div id='top'>
      <h1><%= obj[:title] %></h1>
		</div>
    <div id='main'>
      <p><%= obj[:description] %></p>
      <ul>
        <% obj[:notes].each do |n| %>
          <li><%= n[:title] %></li>
          <li><%= n[:content] %></li><% end %>
      </ul>
    <div id='foot'>
		  copy right
		</div>
  </body>
  </html>
EOF


def benchmark(engine)
  start = Time.now

  10000.times do
	  yield
  end

  seconds = Time.now - start

  puts "%s render time: %ss" % [engine, seconds]
end

benchmark('haml')   { Haml::Engine.new(haml_template).render(Object.new, :obj => obj) }
benchmark('erb')    { ERB.new(erb_template).result }
benchmark('erubis') { Erubis::Eruby.new(erb_template).result }

# haml render time: 44.158047267s
# erb render time: 4.431236469s
# erubis render time: 3.513889438s
	# encoding: utf-8
	require 'rubygems'
	require 'haml'
	require 'erb'
	require 'erubis'

	notes = []
	20.times { notes << {:title => "标题标题", :content => "内容，内容"} }

	obj = {
	:title => '笔记本首页',
	:description => '笔记本' * 100,
	:notes => notes
	}


	haml_template = <<EOF
	!!!
	%html
	%head
	%title= obj[:title]
	%body
	#top
	%h1= obj[:title]
	#main
	%p= obj[:description]

	%ul
	- obj[:notes].each do \|note\|
	%li= note[:title]
	%li= note[:content]
	#foot
	copy right
	EOF

	erb_template = <<EOF
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html>
	<head><title><%= obj[:title] %></title></head>
	<body>
	<div id='top'>
	<h1><%= obj[:title] %></h1>
	</div>
	<div id='main'>
	<p><%= obj[:description] %></p>
	<ul>
	<% obj[:notes].each do \|n\| %>
	<li><%= n[:title] %></li>
	<li><%= n[:content] %></li><% end %>
	</ul>
	<div id='foot'>
	copy right
	</div>
	</body>
	</html>
	EOF


	def benchmark(engine)
	start = Time.now

	10000.times do
	yield
	end

	seconds = Time.now - start

	puts "%s render time: %ss" % [engine, seconds]
	end

	benchmark('haml') { Haml::Engine.new(haml_template).render(Object.new, :obj => obj) }
	benchmark('erb') { ERB.new(erb_template).result }
	benchmark('erubis') { Erubis::Eruby.new(erb_template).result }

	# haml render time: 44.158047267s
	# erb render time: 4.431236469s
	# erubis render time: 3.513889438s