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Summary

This chapter is one of the longer chapters in the book but it covers an extensive amount of ground. Each of the different caching layers has its own complexities, and there are subtle issues that seem to interact with each other to create new and interesting (and extremely frustrating) problems to be solved. We could spend entire chapters on each of these topics and even then barely scratch the surface.

The take-away from this chapter is that while caching can be complicated and intricate, there are many simple things that can be done without too much hassle to reap great performance benefits from your application. Some will be more useful than others, depending on what you’re trying to do. This chapter exposed you to some of the core concepts of caching and thus provided you with a solid starting point for further investigation. Like many things, once you are able to grasp the thread, pulling it free is very easy!


  

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