IT Services Circle

Nov 8, 2026 · Fundamentals

CPU Cache Misses: How Data Layout Causes 6.8x Slowdowns and How to Fix Them

The article explains CPU cache hierarchy, false sharing, cache-friendly data layouts (hot/cold separation, row-major traversal, SoA vs AoS), profiling with perf and Cachegrind, and real-world cases where cache-aware changes yielded 6.8x throughput improvement and reduced CPU usage from 87% to 51%.