The author discusses the benefits of using an Array of Enums (AoE) and a Struct of Arrays (SoA) data layout in programming. The SoA layout reduces memory usage and improves memory bandwidth utilization and SIMD optimization, by restructuring data fields in separate arrays. The author also introduces the concept of using enums with arrays and the benefits of using an Enum of Arrays (EoA) layout. EoA reduces memory waste and CPU branching, allowing for more efficient SIMD optimization. The author highlights how TigerBeetle optimizes operations using EoA layouts, demonstrating the advantages of control plane and data plane separation.
https://tigerbeetle.com/blog/2024-12-19-enum-of-arrays/