看到「Disabling Slack Indexing Seems to Improve Spotlight Performance on iOS」這篇講 iOS 的 Spotlight Search 很慢的問題，作者後來找到與 Slack 有關？到這邊關掉就正常了：
Settings > General > Spotlight Search > toggle Slack off
我是沒遇到... 不過先寫起來，如果以後遇到時應該會有幫助。
Tag: spotlight
修正 Mac OS X Yosemite (10.10) 的設定以確保隱私
Hacker New Daily 上看到的：「Fix Mac OS X Yosemite」。原因是 Spotlight 的部份 Apple 與 Bing 合作：
If you've upgraded to Mac OS X Yosemite (10.10) and you're using the default settings, each time you start typing in Spotlight (to open an application or search for a file on your computer), your local search terms and location are sent to Apple and third parties (including Microsoft).
有兩個地方要關閉。一個是系統設定，一個是 Safari 設定，細節在原文裡面有，這邊就不抄過來了。