=== optuna-0001: optuna-0001 — O(N³) Non-Dominated Sort in _calculate_nondomination_rank ===
N=100   k=100  : defective=0.125ms  fixed=0.004ms  speedup=34.0x
N=500   k=500  : defective=2.303ms  fixed=0.022ms  speedup=102.5x
N=1000  k=1000 : defective=9.839ms  fixed=0.050ms  speedup=196.0x
N=2000  k=2000 : defective=38.520ms  fixed=0.097ms  speedup=397.8x

