jaml.rb

require 'benchmark'
require 'haml'
require 'tilt'

Tilt.register Haml::Engine, 'haml'

class Template

  attr_reader :response, :locals

  def self.render(locals, &block)
    t = new(locals, &block)
    t.response
  end

  def initialize(locals, &block)
    @locals = locals
    @response = instance_exec(&block).to_s
  end

  def tag(node, opts, text=nil)
    elms = []
    opts.each do |k,v|
      elms.push(k.to_s.gsub(/_/,'-')+'="'+v.to_s.gsub(/"/,'"')+'"') if v# if ['id','title','class','name','data-','onmousedown','onclick','href'].include?k.to_s 
    end
    ret = elms.length > 0 ? ' '+elms.join(' ') : ''
    if node
      text ||= '' if node.to_s == 'button'
      return text ? %{<#{node}#{ret}>#{text}</#{node}>} : %{<#{node}#{ret} />}
    end
    ret
  end

  def element(*args)
    name = args.shift
    opts = {}
    if args[0].kind_of?(Hash)
      opts = args.shift
    end
    element_render name, opts, args.map{ |el|
      el = el.call() if el.kind_of?(Proc)
      el
    }.join('')
  end

  def element_render(name, *args)
    return %[<#{name}></#{name}>] unless args[0]

    if args[0].kind_of?(String) && !args[1]
      return tag name, {}, args[0]
    elsif args[0].kind_of?(String) && args[1].kind_of?(String)
      return tag name, {}, args.join('')
    else
      return tag name, args[0], args[1]
    end
  end

  def method_missing(name, *args)
    element name, *args
  end

end

def ruby_render
  tpl_data = {
    products:[
      { id:1, name:'Mac' },
      { id:2, name:'PC' },
      { id:3, name:'UNIX' }
    ]
  }

  Template.render tpl_data do
    html(
      head(
        title('Naslov'),
        meta({ name:'robots', value:'index, follow' })
      ),
      -> {
        100.times do
          body({ class:'product'},
            h1('Dober dan'),
            ul(->{
              locals[:products].map do |el|
                tag :li, { id:"p-#{el[:id]}"}, el[:name]            
              end.join('')
            })
          )
        end
      }
    )
  end
end

class HamlData
  def initialize
    @title = 'Miki riki'
    @products = [
      { id:1, name:'Mac' },
      { id:2, name:'PC' },
      { id:3, name:'UNIX' }
    ]
  end
end

def haml_render
  Thread.current[:t] ||= Tilt::HamlTemplate.new('./haml_template.haml', :ugly=>true)

  data = HamlData.new

  Thread.current[:t].render(data)
end

# haml_render

n = 1000
Benchmark.bm do |x|
  x.report('ruby') { n.times do; ruby_render; end }
  x.report('haml') { n.times do; haml_render; end }
end