"cbtohtml.rb" copied clipboard:

[slmn@azrael cbtohtml]$ time ./cbtohtml.rb &>/dev/null

real    0m0.726s
user    0m0.313s
sys     0m0.043s

cbtohtm.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'syntax/convertors/html'

if ARGV.size == 0 then
  require 'Qt4'
  app = Qt::Application.new []
  clipboard = Qt::Application.clipboard
  @code = clipboard.text
elsif ARGV.size == 1
  @code = File.read(ARGV[0])
else
  puts "without argument converts clipboard content\nUsage:\n"
  puts "cbtohtml.rb [filename.rb]\ncbtohtml.rb [filename.rb] > output.html\n"
  exit
end

convertor = Syntax::Convertors::HTML.for_syntax "ruby"
puts convertor.convert(@code)

from file:

[slmn@azrael cbtohtml]$ time ./cbtohtml.rb cbtohtml.rb &>/dev/null

real    0m0.189s
user    0m0.133s
sys     0m0.023s