facebook/react-native
May 2025 – Oct 2025
2 Months active
Languages Used
C++JavaScriptObjective-C++
Technical Skills
C++Performance OptimizationSoftware DesignAnimationFabric ArchitectureReact Native
Bartłomiej Błoniarz
PROFILE
Bartłomiej Błoniarz
Over a two-month period, contributed core architectural and performance enhancements to the facebook/react-native repository, focusing on C++, React Native, and Fabric Architecture. Developed the ShadowNode.cloneMultiple method to enable efficient batch cloning of multiple nodes and their ancestors in a single transaction, reducing rendering overhead for complex node trees and introducing a callback for customizable cloning flows. Later, implemented structured animation plumbing by delivering the AnimatedProps API and AnimatedPropsBuilder, refactoring NativeAnimatedNodesManager to process animated property diffs more consistently. These features established a foundation for future cross-framework animation integration and ongoing performance optimization across the React Native rendering pipeline.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
2
Lines of code
423
Activity Months2
Your Network
422 peopleSame Organization
@swmansion.com57
Shared Repositories
365
hobostayMember
LS HungMember
Christian FalchMember
Alexander KlotzMember
Aliaksei AndreyeuMember
Peter AbbondanzoMember
Adam ErnstMember
Adan MorenoMember
Adrian StoneMember
Work History
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for facebook/react-native: Implemented structured animation plumbing to improve cross-framework animation integration. Delivered AnimatedProps API and AnimatedPropsBuilder to structure and pass animated property diffs to the animation backend, and refactored NativeAnimatedNodesManager to schedule and apply updates using these classes. This work lays the foundation for more consistent, maintainable, and performant animations across platforms.
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for facebook/react-native: Implemented structured animation plumbing to improve cross-framework animation integration. Delivered AnimatedProps API and AnimatedPropsBuilder to structure and pass animated property diffs to the animation backend, and refactored NativeAnimatedNodesManager to schedule and apply updates using these classes. This work lays the foundation for more consistent, maintainable, and performant animations across platforms.
October 2025
May 2025
1 Commits • 1 Features
May 1, 2025In May 2025, delivered a core performance enhancement in facebook/react-native by introducing ShadowNode.cloneMultiple, enabling batch cloning of multiple nodes and their ancestors in a single transaction. This eliminates redundant updates and significantly reduces rendering overhead for complex node trees. Feature is extensible via a callback to customize the cloning flow, enabling flexible optimizations going forward. The work is anchored by commit 1161fb4fcd6a0cac3a691de1f37cc7f9d6a861a5 (Add `cloneMultiple` method to the `ShadowNode` class). No critical bugs fixed this month; primary focus was architectural improvement and performance gains with a clear path to broader impact across the rendering pipeline.
May 2025
1 Commits • 1 Features
May 1, 2025In May 2025, delivered a core performance enhancement in facebook/react-native by introducing ShadowNode.cloneMultiple, enabling batch cloning of multiple nodes and their ancestors in a single transaction. This eliminates redundant updates and significantly reduces rendering overhead for complex node trees. Feature is extensible via a callback to customize the cloning flow, enabling flexible optimizations going forward. The work is anchored by commit 1161fb4fcd6a0cac3a691de1f37cc7f9d6a861a5 (Add `cloneMultiple` method to the `ShadowNode` class). No critical bugs fixed this month; primary focus was architectural improvement and performance gains with a clear path to broader impact across the rendering pipeline.
Activity
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Quality Metrics
Correctness90.0%
Maintainability80.0%
Architecture90.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++JavaScriptObjective-C++
Technical Skills
AnimationC++Fabric ArchitecturePerformance OptimizationReact NativeSoftware Design
Repositories Contributed To
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