If you're working on compilers, runtimes, or low-level systems…
Stop asking “what is cache?”
Start asking 👉 “what kind of miss did my code create?”
💡 One bad memory access = hundreds of cycles lost
💡 L1 → L3 → DRAM = massive slowdown
💡 Performance = access pattern, not just instructions
I broke it all down with real benchmarks (Ryzen 9700X) 👇
https://www.compilersutra.com/docs/coa/memory-hierarchy/
⚡ Learn:
• Cache misses & set conflicts
• False sharing & multithreading pitfalls
• TLB & page-walk cost
• Why loop tiling gives 30x speedups
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