Assembly Hall of Shame Overview Instruction latency analysis usually focuses on performance optimization —making code run as fast as possible. The Assembly Hall of Shame takes the opposite approach: searching for the absolute floor of single-instruction performance. 🏆 Current Champions 🏆 x86 : fxrstor64 Strategy : Use fxrstor64 to load 512-byte FPU/MMX/XMM state from a high-latency MMIO region in the PCIe fabric, then starve the fabric while the load is in flight — a fleet of hammer cores pounds a different high-latency MMIO register with tight 4-byte reads, saturating the PCIe root complex and endpoint with non-posted transactions, so CPU 0's 512-byte fxrstor64 must queue behind all that contending traffic.…