openmobilemaps/maps-core
Nov 2024 – Jul 2025
2 Months active
Languages Used
C++Kotlin
Technical Skills
Algorithm DesignC++ConcurrencyConcurrency ControlGraphics ProgrammingMap Rendering
Simon Roesch
PROFILE
Simon Roesch
Worked on the openmobilemaps/maps-core repository to enhance map rendering performance and stability, focusing on concurrency and thread safety in C++ and Kotlin. Developed a prioritized, parallel tile loading system to accelerate initial map rendering, and introduced stable hashing for mailbox member functions to ensure consistent behavior under concurrent workloads. Improved polygon rendering by implementing thread-safe data access using mutexes, reducing race conditions during complex scenes. Additionally, addressed a concurrency bug in Android touch event handling by refactoring event processing into coroutine scopes, which stabilized gesture recognition. The work emphasized algorithm design, graphics programming, and performance optimization for mobile environments.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
5Total
Bugs
3
Commits
5
Features
1
Lines of code
100
Activity Months2
Your Network
35 peopleShared Repositories
15
Work History
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary: Delivered a critical Android touch event concurrency bug fix for openmobilemaps/maps-core, improving stability and gesture reliability in the Android maps experience. Refactored touch event processing to dispatch within a coroutine scope to prevent concurrent reads during overlapping operations. This work reduces user-visible glitches and supports upcoming performance enhancements.
1 Commits
Jul 1, 2025July 2025 monthly summary: Delivered a critical Android touch event concurrency bug fix for openmobilemaps/maps-core, improving stability and gesture reliability in the Android maps experience. Refactored touch event processing to dispatch within a coroutine scope to prevent concurrent reads during overlapping operations. This work reduces user-visible glitches and supports upcoming performance enhancements.
July 2025
November 2024
4 Commits • 1 Features
Nov 1, 2024OpenMobileMaps maps-core - November 2024: Focused on improving map rendering performance, stability, and concurrency under real-world usage. Delivered prioritized, parallel tile loading for faster initial render; stabilized mailbox hashing; and hardened polygon rendering with thread-safety measures. These changes reduce first-paint time, improve reliability in dynamic scenes (including time-travel loading), and strengthen rendering robustness under multi-threaded workloads.
November 2024
4 Commits • 1 Features
Nov 1, 2024OpenMobileMaps maps-core - November 2024: Focused on improving map rendering performance, stability, and concurrency under real-world usage. Delivered prioritized, parallel tile loading for faster initial render; stabilized mailbox hashing; and hardened polygon rendering with thread-safety measures. These changes reduce first-paint time, improve reliability in dynamic scenes (including time-travel loading), and strengthen rendering robustness under multi-threaded workloads.
Activity
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Quality Metrics
Correctness80.0%
Maintainability80.0%
Architecture76.0%
Performance68.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++Kotlin
Technical Skills
Algorithm DesignAndroid DevelopmentC++ConcurrencyConcurrency ControlGraphics ProgrammingMap RenderingMobile DevelopmentOpenGLPerformance OptimizationSoftware Engineering
Repositories Contributed To
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