This book is primarily concerned with helping you understand the basics of performance from a nuts-and-bolts perspective. It is critical to understand the cost of your building blocks before putting together larger applications. Everything covered so far in this book applies to most .NET application types, including those discussed in this appendix.
This appendix will take a step higher and give you a few brief tips for popular types of applications. I will not cover these topics in nearly as much detail as in the rest of this book, so think of this as a general overview to inspire further research. For the most part, these tips are not related to .NET, per se, but are architecture-, domain-, or library-specific.