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docs: SSL/TLS

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Chapter1 - iOS/1.94.md
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网传：如果在老设备上，使用最新的 iOS 系统，苹果会自动降频（CPU 频率），从而让你的 iPhone 看上去很卡，让你主动去购买新的设备。
其实，苹果在 iOS 13 的时候，在内核中加入了一个新的性能衡量指标`wakeup`。CPU 频率和设备电池有关系。看看 ARM 架构中对于 CPU 功耗问题的描述：
> Many ARM systems are mobile devices and powered by batteries. In such systems, optimization of power use, and total energy use, is a key design constraint. Programmers often spend significant amounts of time trying to save battery life in such systems.