Efficient Data Structures (Overview)

• Array of Struct (AoS) vs Struct of Array (SoA).
• Data structures should adapt to both CPU and GPU.
• Collaboration with Jolly (ROOT) and Daniele (with Stefan Roiser) to ensure portability accross experiments.

Updates from last week

• I took the course "C++ Expert" together with the NextGenTrigger newstarters.
• We asked the teacher about our task (AoS vs SoA):
  
  • He himself failed at implementing reflections using native C++ techniques.
  • Everybody is coding their own reflection-like tool, but no library is satisfactory.
  • That's why reflections were proposed for C++26.
  • He is not sure if the feature will really be introduced in C++26. There are still open questions.
• Attila (ATLAS) will propose his own SoA data structure to us on Friday. I am reading his code.

General ongoing work

• Try to achieve SoA using standart C++ techniques, taylored to O2.
• Try to understand O2 code.
• Try to understand reflections.