=== gorm-0001: callbacks.go getRIndex linear scan in sortCallbacks ===
N=100   k=100  : defective=0.097ms  fixed=0.004ms  speedup=24.3x
N=500   k=500  : defective=2.449ms  fixed=0.024ms  speedup=102.6x
N=1000  k=1000 : defective=10.050ms  fixed=0.052ms  speedup=195.0x
N=2000  k=2000 : defective=35.734ms  fixed=0.098ms  speedup=364.4x

