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aozhimin committed Aug 2, 2017
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Expand Up @@ -489,6 +489,8 @@ int64_t getUsedMemory()
}
```

> 读者可能会看到有些代码会使用 `vm_statistics_data_t` 结构体,但是这个结构体是32位机器的,随着 Apple 逐渐放弃对32位应用的支持,所以建议读者还是使用 `vm_statistics64_data_t` 64位的结构体。
## Startup Time

毫无疑问移动应用的启动时间是影响用户体验的一个重要方面,那么我们究竟该如何通过启动时间来衡量一个应用性能的好坏呢?启动时间可以从冷启动和热启动两个角度去测量
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