builders.rb

require "rubygems"
require "builder"
require "benchmark"

class WithElements < Builder::XmlMarkup
  def some_elem(&blk)
    self << "<some-elem>"
    blk.call(self)
    self << "</some-elem>"
  end
end

@base = Builder::XmlMarkup.new
@augmented = WithElements.new

def write_elements(into)
  1000.times do
    into.some_elem do | nest |
      nest << "Tekst"
    end
  end
end

Benchmark.bm do | r |
  r.report("with simple XmlBase") do
    100.times { write_elements(@base) }
  end
  
  r.report("with predefined method") do
    100.times { write_elements(@augmented) }
  end
end