--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.virtual/src/org/graalvm/compiler/virtual/phases/ea/EffectsPhase.java	Thu Nov 15 21:05:47 2018 +0100
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.virtual/src/org/graalvm/compiler/virtual/phases/ea/EffectsPhase.java	Thu Nov 15 09:04:07 2018 -0800
@@ -38,7 +38,7 @@
 import org.graalvm.compiler.phases.BasePhase;
 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
 import org.graalvm.compiler.phases.common.DeadCodeEliminationPhase;
-import org.graalvm.compiler.phases.common.util.HashSetNodeEventListener;
+import org.graalvm.compiler.phases.common.util.EconomicSetNodeEventListener;
 import org.graalvm.compiler.phases.graph.ReentrantBlockIterator;
 import org.graalvm.compiler.phases.schedule.SchedulePhase;
 import org.graalvm.compiler.phases.tiers.PhaseContext;
@@ -96,7 +96,7 @@
 
                     if (closure.needsApplyEffects()) {
                         // apply the effects collected during this iteration
-                        HashSetNodeEventListener listener = new HashSetNodeEventListener();
+                        EconomicSetNodeEventListener listener = new EconomicSetNodeEventListener();
                         try (NodeEventScope nes = graph.trackNodeEvents(listener)) {
                             closure.applyEffects();
                         }