paulgessinger/acts
Nov 2025 – Feb 2026
4 Months active
Languages Used
C++
Technical Skills
Algorithm DesignC++Data StructuresSoftware DevelopmentAlgorithm OptimizationCode Maintenance
jpreston-cern
PROFILE
Jpreston-cern
Worked on the paulgessinger/acts repository to modernize and optimize the GBTS pipeline over four months, focusing on performance, maintainability, and alignment with Athena standards. Delivered a series of C++ features including a major API and data structure overhaul, introduction of new space point and seed containers, and migration to GBTSv3 with CPU-oriented optimizations. Applied algorithm design and code refactoring skills to improve initialization speed, memory safety, and code readability, while consolidating logic for easier audits and future enhancements. Enhanced tracklet generation and edge creation through refined lookup tables and steering variables, achieving performance parity with Athena implementations.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
8Total
Bugs
0
Commits
8
Features
4
Lines of code
6,493
Activity Months4
Your Network
365 peopleSame Organization
@cern.ch341
Work History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026: Delivered significant modernization and migration work for theActs GBTS pipeline, focusing on performance, code quality, and maintainability. Implemented GBTSv3 migration with CPU-oriented optimizations and aligned coding standards across the codebase.
2 Commits • 1 Features
Feb 1, 2026February 2026: Delivered significant modernization and migration work for theActs GBTS pipeline, focusing on performance, code quality, and maintainability. Implemented GBTSv3 migration with CPU-oriented optimizations and aligned coding standards across the codebase.
February 2026
January 2026
4 Commits • 1 Features
Jan 1, 2026January 2026: Delivered ACTS-compliant GBTS module improvements focusing on safety, readability, and initialization performance. Consolidated refactors across GbtsSeedingAlgorithm, GbtsDataStorage, GbtsGeometry, and GbtsTrackingFilter, establishing safer initialization and reducing per-event LUT parsing. These changes position the codebase for faster startup, easier audits, and smoother future maintenance.
January 2026
4 Commits • 1 Features
Jan 1, 2026January 2026: Delivered ACTS-compliant GBTS module improvements focusing on safety, readability, and initialization performance. Consolidated refactors across GbtsSeedingAlgorithm, GbtsDataStorage, GbtsGeometry, and GbtsTrackingFilter, establishing safer initialization and reducing per-event LUT parsing. These changes position the codebase for faster startup, easier audits, and smoother future maintenance.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for paulgessinger/acts: Delivered GBTS enhancements focused on performance parity with Athena and improved tracklet generation through a cluster-width lookup for barrel spacepoints and refined track filter steering variables. No major bugs fixed this month. Business impact: improved edge creation and connection, more reliable tracklet generation, and closer alignment of GBTS CPU behavior with Athena, enabling consistent reconstructions and faster processing pipelines.
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for paulgessinger/acts: Delivered GBTS enhancements focused on performance parity with Athena and improved tracklet generation through a cluster-width lookup for barrel spacepoints and refined track filter steering variables. No major bugs fixed this month. Business impact: improved edge creation and connection, more reliable tracklet generation, and closer alignment of GBTS CPU behavior with Athena, enabling consistent reconstructions and faster processing pipelines.
December 2025
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Delivered a major GBTS upgrade in paulgessinger/acts, focusing on performance optimization and API/data-structure overhaul aligned with the latest Athena implementation. Implemented new space point and seed containers, removed unused variables, and restructured code for maintainability. Adjusted API interfaces to be compatible with future Athena updates. These changes result in significant efficiency gains and set the foundation for a future MR to merge the Athena-based GBTS with the legacy code. The changes also improve maintainability, reduce potential warnings, and future-proof the repository for upcoming updates.
November 2025
1 Commits • 1 Features
Nov 1, 2025Month 2025-11: Delivered a major GBTS upgrade in paulgessinger/acts, focusing on performance optimization and API/data-structure overhaul aligned with the latest Athena implementation. Implemented new space point and seed containers, removed unused variables, and restructured code for maintainability. Adjusted API interfaces to be compatible with future Athena updates. These changes result in significant efficiency gains and set the foundation for a future MR to merge the Athena-based GBTS with the legacy code. The changes also improve maintainability, reduce potential warnings, and future-proof the repository for upcoming updates.
Activity
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Quality Metrics
Correctness87.6%
Maintainability85.0%
Architecture85.0%
Performance85.0%
AI Usage32.6%
Skills & Technologies
Programming Languages
C++
Technical Skills
Algorithm DesignAlgorithm OptimizationC++Code MaintenanceCode RefactoringData StructuresPerformance OptimizationSoftware DevelopmentSoftware Refactoring
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