Why Cache Misses Are the Real Performance Killer скачать в хорошем качестве

Why Cache Misses Are the Real Performance Killer

Cache misses are the #1 reason your code runs slower than it should—here's exactly why your CPU spends most of its time waiting instead of computing. Your CPU can execute billions of operations per second, but only when it has data to work with. When data isn't in cache, everything stops. This video breaks down the memory hierarchy, shows you what actually happens during a cache miss, and reveals why simple changes to your code can deliver 100x performance improvements. You'll learn why row-major vs column-major array traversal creates massive performance differences, how loop tiling keeps data hot in cache, and why data layout (Struct of Arrays vs Array of Structs) matters more than most optimizations you've ever tried. Whether you're writing performance-critical systems code, optimizing game engines, or just curious about what's actually happening inside your computer, understanding cache behavior separates fast code from slow code. 🔔 Subscribe for more deep dives into computer architecture and performance optimization. 👍 Like if this changed how you think about writing fast code. #programming #performance #computerscience #cpucache #optimization #coding #softwareengineering