expo/expo
Sep 2025 – Sep 2025
1 Month active
Languages Used
JavaKotlinMarkdown
Technical Skills
Android DevelopmentCode RefactoringKotlin ReflectionPerformance Optimization
Alexis CHAPPRON
PROFILE
Alexis Chappron
Worked on optimizing the startup performance of expo-modules within the expo/expo repository by addressing latency issues caused by Kotlin reflection. Refactored class relationship checks, replacing the use of isSubclassOf with isAssignableFrom, which reduced reliance on reflection and improved startup speed. This change enhanced perceived app performance and contributed to a smoother onboarding experience by lowering startup overhead. The work involved performance profiling, code refactoring, and deep familiarity with Kotlin and Java in a large-scale Android codebase. Focused on practical performance optimization, the approach demonstrated an ability to identify bottlenecks and implement targeted solutions in production environments.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
1Total
Bugs
0
Commits
1
Features
1
Lines of code
7
Activity Months1
Your Network
92 peopleWork History
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 highlights for expo/expo: Delivered Expo Modules Startup Performance Optimization by removing Kotlin reflection reliance and refactoring class relationship checks, replacing isSubclassOf with isAssignableFrom to speed startup. Implemented in the expo/expo repo with commit 475da9c658e621d2bccd689d7ba01135034d6735. Impact: faster app startup and improved perceived performance, contributing to faster onboarding and lower startup overhead. Skills demonstrated include Kotlin/Java optimization, performance profiling, and code refactoring in a large codebase.
1 Commits • 1 Features
Sep 1, 2025September 2025 highlights for expo/expo: Delivered Expo Modules Startup Performance Optimization by removing Kotlin reflection reliance and refactoring class relationship checks, replacing isSubclassOf with isAssignableFrom to speed startup. Implemented in the expo/expo repo with commit 475da9c658e621d2bccd689d7ba01135034d6735. Impact: faster app startup and improved perceived performance, contributing to faster onboarding and lower startup overhead. Skills demonstrated include Kotlin/Java optimization, performance profiling, and code refactoring in a large codebase.
September 2025
Activity
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Quality Metrics
Correctness80.0%
Maintainability80.0%
Architecture80.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaKotlinMarkdown
Technical Skills
Android DevelopmentCode RefactoringKotlin ReflectionPerformance Optimization
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