benchmark for http://stackoverflow.com/questions/16417292/how-do-i-remove-white-space-between-html-nodes/16418490?noredirect=1#comment23986774_16418490

gistfile1.rb

require 'benchmark'
require 'nokogiri'

n = 50000
Benchmark.bm do |x|
  x.report { doc = Nokogiri::HTML::DocumentFragment.parse("<p>Foo Bar</p> <p>bar bar bar</p> <p>bla</p>") ; doc.children.map{|node| node.to_s.strip}.compact.join }
  x.report { doc = Nokogiri::HTML::DocumentFragment.parse("<p>Foo Bar</p> <p>bar bar bar</p> <p>bla</p>") ; doc.children.each { |node| next_node = node.next_sibling ; next_node.remove if next_node && next_node.text.strip == '' } }
  x.report { doc = Nokogiri::HTML("<p>Foo Bar</p> <p>bar bar bar</p> <p>bla</p>") ; doc.search('p').each { |node| next_node = node.next_sibling ; next_node.remove if next_node && next_node.text.strip == '' } }
end


# Results
       user     system      total        real
   0.000000   0.000000   0.000000 (  0.000460)
   0.000000   0.000000   0.000000 (  0.000181)
   0.000000   0.000000   0.000000 (  0.000117)