16. Measurement and Analysis
Passer Rating has quite a way to go before it’s useful for the general public, but you’ve run it several times, and begun a testing régime, and you’re pretty confident that to the naked eye, it works.
As usual, the qualifier (“to the naked eye”) means more than “it works.” There are issues in Passer Rating of speed and memory performance. Before you can act, you have to know what’s going on—you have to profile the app. The Instruments application is the tool for profiling applications.
Note
If you follow along with me—I recommend starting from the sample code for the end of the previous chapter—you will find different statistics than I show here. You and I have different computers, different devices (if your developer-program ...
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