Summary
In this chapter, we saw how there are always downsides to every decision and every choice has a cost attached because nothing comes for free. There are always tradeoffs involved, and you need to be aware of the consequences of your actions, which may be small and subtle.
The key lesson is to take a thoughtful and rigorous approach to adding any performance-enhancing technique. Measurement is crucial to achieving this, but you also need to know how data can mislead you if you collect or interpret it incorrectly.
In the next chapter, we will continue with the measurement theme and learn how to use tests to monitor for performance regressions. You will see how to use testing (including unit testing), automation, and continuous integration to ...
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