anchor.diff:      let output_dir = config.OutputDir
       let source_dir = config.SourceDir
   
  +    let stopwatch = new System.Diagnostics.Stopwatch();
  +    stopwatch.Start();
  +
       // setup output folder
       if Directory.Exists(output_dir) = false then
           Directory.CreateDirectory(output_dir) |> ignore
  
positive.code:                         write_output_file p.Url rendered output_dir                
                      )
  
      printfn "processed %i pages" <| Seq.length pages
  
      // compress js and css using YUI
  
negative.code:         let posts = pageModels |> Seq.filter (fun p -> is_post(p) = true   ) 
          create_rss posts config.Url config.BlogTitle config.BlogDesc config.BlogAuthor config.OutputDir
  
  
      stopwatch.Stop
      let elapsed = stopwatch.Elapsed.ToString();
      printfn "ellapsed %s" elapsed
      printfn "done!"
  
  
      ()
  
  