The Performance Comparison from Delphi 2010 to XE6 series of blog posts has easily been the most popular ones I have ever done. However, I know that it can be difficult to read as the blogging format is not really the best format for what is essentially an article. I received a couple requests for a PDF version of the blog posts. If you want to read the series as one big PDF (59 pages), you can download it here: Performance Comparison from Delphi 2010 to XE6. It has been lightly edited from the blog to enhance the clarity and continuity.
Enjoy! Happy CodeSmithing!