=== vertx-core-0001: HAManager.nodeLeft — O(N×M) nodes List.contains inside clusterMap loop ===
N=100   k=100  : defective=0.109ms  fixed=0.007ms  speedup=15.9x
N=500   k=500  : defective=2.901ms  fixed=0.026ms  speedup=112.8x
N=1000  k=1000 : defective=11.258ms  fixed=0.059ms  speedup=191.1x
N=2000  k=2000 : defective=37.753ms  fixed=0.094ms  speedup=400.8x

