You decode a 100×100 pixel RGBA PNG (3KB on… - Performance and debugging | Daily iOS

Back to question bank

Performance and debuggingKuaishou

Computing decoded image memory

You decode a 100×100 pixel RGBA PNG (3KB on disk) to draw it on screen. Which value is closest to the memory the bitmap takes?

Pick one

Performance and debuggingShort answerAdvanced
A photo editing app gets frequent memory warnings and sometimes gets killed. In what orde…
#image #memory
Performance and debuggingShort answerAdvanced
You need to show a single 50MB photo on screen. If you just load it with UIImage(contents…
#image #memory
iOS system designMultiple choiceIntro
You show 60 thumbnails of 4000×3000 JPEGs in a 3-column grid and memory jumps to several …
#image #memory
Performance and debuggingShort answerAdvanced
Users say "the app just closes," but Crashlytics has nothing. If you suspect out-of-memor…
#memory