Performance and debugging
Causes of scroll stutter
You inherit an app whose UICollectionView stutters while scrolling. Which of these can cause the stutter? Select all that apply.
Pick all that apply
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Performance and debuggingShort answerBasics
On a phone screen the interviewer asks: "A user reports that scrolling stutters. Where wo…
#scroll #main-thread
UIKitShort answerAdvanced
You get a report that scrolling stutters on a feed screen that mixes images and text. Whe…
#scroll #offscreen-rendering
Performance and debuggingShort answerAdvanced
Users report that a certain screen occasionally freezes for about a second, but you can't…
#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…
#main-thread