Cruisecontrol.rb is too slow

I encountered a problem with Cruisecontrol.rb, the method link_to_code(log) is too slow to process a certain output log, sometime it takes 10 seconds making Cruisecontrol not workable. So for the time being, as workaround, I just comment out this code .

#file: app/helpers/builds_helper.rb
  def link_to_code(log)
    log
=begin    
    @work_path ||= File.expand_path(@project.path + '/work')

    log.gsub(/((\#\{RAILS_ROOT\}\/)?([\w\.-]*\/[ \w\/\.-]+)\:(\d+))/) do
      path, line = File.expand_path($3, @work_path), $4
      
      if path.index(@work_path) == 0
        path = path[@work_path.size..-1]
        link_to ".#{path}:#{line}", "/projects/code/#{@project.name}#{path}?line=#{line}##{line}"
      else
        $1
      end
    end
=end
  end