Explore the intricacies of out-of-order execution in modern CPUs and its impact on software performance in this illuminating conference talk from NDC TechTown 2023. Delve into the common thread that unites high-performance and desktop CPUs: their ability to dynamically reorder machine code execution for increased efficiency. Learn how CPUs analyze data dependencies between instructions to optimize execution without compromising correctness. Discover the advantages and limitations of out-of-order execution, and gain practical techniques to leverage this feature in C and C++ programming. Understand which optimization efforts are worth focusing on and which are best left to compilers and CPUs. By the end of this talk, acquire a deeper understanding of out-of-order processors and how to harness their power to write more efficient code faster.