苹果官方就部分用户反映的 iPhone 18 Pro/Max 以及升级 iOS 27 的 iPhone 17 等旧款机型出现短暂运行缓慢的问题做出解释1。根据苹果的说法，这一现象由 Spotlight 索引的创建过程引起1。苹果表示，首次建立索引时任务规模最大，用户最容易感知到设备性能下降，而索引所需耗时因设备存储的数据量不同而异，可能需要数小时甚至数天才能完成1。
索引过程完成后，用户将获得明显的使用体验改善1。Spotlight 将能更快速地搜索邮件、文件和备忘录等内容，同时 Siri AI 也能基于索引数据返回更加相关的搜索结果1。为了加快索引进程，苹果建议用户保持设备处于闲置状态并接通电源，同时确保设备已通过 Wi-Fi 或以太网连接互联网1。
Apple has attributed reports of temporary performance slowdowns on iPhone 18 Pro, iPhone 18 Pro Max, and older iPhone 17 models upgraded to iOS 27 to the initial creation of Spotlight search indexes 1. The company explained that the first-time indexing process is the most resource-intensive, potentially taking anywhere from several hours to multiple days depending on the volume of data stored on the device 1.
According to Apple's statement, users are most likely to notice performance degradation during this initial indexing phase 1. The company noted that some devices have experienced wait times of approximately one week 1. Once indexing is complete, Spotlight will be able to locate emails, files, and notes more quickly, and Siri's AI capabilities will benefit from the indexed information to deliver more relevant results 1. Apple indicated that the indexing process is optimized when the device is idle, connected to power, and linked to the internet via Wi-Fi or Ethernet 1.
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