Why 2 × 64 Is Not 1 × 128为什么 2 × 64 不等于 1 × 128
Working outline. Reproduction and evidence are still being collected.研究提纲：复现过程与证据仍在收集中。
The arithmetic count alone does not describe scheduling, occupancy, memory behavior, or launch cost. TODO: add the verified experiment.
仅凭运算量无法描述调度、占用率、内存行为或启动成本。TODO：补充经过验证的实验。