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Cache-Line Aligned Market Data Struct

Medium · memory_optimization · Quant Developer interview question · alignas, cache-line, struct-packing, false-sharing, memory-optimization, c++17, low-latency, static-assert

Cache-line false sharing is a critical latency hazard in multi-threaded market data pipelines, where concurrent writes to different fields on the same cache line cause performance stalls. High-frequency trading (HFT) systems mitigate this by explicitly padding and aligning frequently accessed data structures to cache-line boundaries, ensuring predictable L1 access latency and eliminating cross-core invalidation. This technique optimizes memory access patterns for critical financial data. Task I