Something

def test1
   head = "\"|HEAD|\"" * 50000
   body = "\"|BODY|\"" * 50000

   template = %Q|
      <html>
      !head!
      <body>
      !body!
      </body>
      </html>
   |

   template.gsub!(/!head!/, head)
   template.gsub!(/!body!/, body)

   puts template
end