Skip to content
Skills
Problems
Questions
Drills
Roles
Skills
Interview
Contest
Leaderboard
Problems
Questions
Drills
Roles
Skills
Interview
Contest
Leaderboard
Home
/
Mobile App Developer
/
Questions
/
Performance
Mobile App Developer
Performance questions
10 questions on Performance for mobile app developers, easiest first.
Easy
2
Network calls on the main thread
easy
Testing speed on a debug build
easy
Medium
1
const constructors in Flutter
medium
Hard
7
Too many recompositions
hard
Jank when parsing a big JSON
hard
Slow cold start
hard
When a Swift array is copied
hard
derivedStateOf for a scroll button
hard
Animation stutters while JS is busy
hard
Memoized rows still re-render
hard
