Key Takeaways Cache misses can slow down your code by 60x compared to L1 cache hits False sharing occurs when multiple cores update different variables in the same cache line Proper data structure padding can improve performance by 5-10x in specific scenarios Data-oriented design beats object-oriented for high-performance systems Always measure with benchmarks - cache effects are hardware-specific Table of Contents Understanding CPU Cache Hierarchy False Sharing: The Silent Performance Killer Ca...