CGI::Pretty inherits from CGI so it loads CGI.pm. No improvement there. It goes through extra work to maintain nicely formatted HTML, so no improvement there. It sends lots of extra whitespace down the pipe, which can be a huge slowdown as pages get big and complex. (As a slight reprieve the excess compresses well for users on modems.)

There is one reason and one reason only for using CGI::Pretty. And that is that you want to be able to read and understand the output HTML. (Which is not a bad reason, all things considered.) But performance is made worse, not better.