https://developer.apple.com/videos/play/wwdc2016/721/

Os_log vs NSLog:

https://zditect.com/blog/429205.html

About os_log:

https://medium.com/@ot32em/swift-%E4%BD%BF%E7%94%A8-os-log-%E4%BE%86%E7%B4%80%E9%8C%84-80d7fc16df75

Explore logging in Swift

https://developer.apple.com/videos/play/wwdc2020/10168/