Concurrency
Run loop modes
While the user scrolls, an on-screen countdown Timer stops, and when scrolling ends it catches up all at once. From the run loop's point of view, what's the cause?
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ConcurrencyShort answerIntro
In a UIKit screen you set label.text = result inside a network response callback, and som…
#runloop #main-thread
Performance and debuggingShort answerAdvanced
You want to add a feature to your in-house APM that captures a stack whenever the main th…
#runloop #main-thread
UIKitShort answerAdvanced
Each cell in a UITableView flash sale list shows a countdown like "Time left 00:12:34" th…
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CS fundamentals and algorithmsShort answerBasics
What's the difference between a process and a thread? What do threads share, and what doe…
#main-thread