From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Andrew Steinborn Date: Mon, 9 Aug 2021 00:38:37 -0400 Subject: [PATCH] Optimize indirect passenger iteration diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java index b15fed51ee86290cb1e5bbb58c3ad2dc80c0cb08..ed58ede6a929ec635e01d91cec04972b50c5c04f 100644 --- a/src/main/java/net/minecraft/world/entity/Entity.java +++ b/src/main/java/net/minecraft/world/entity/Entity.java @@ -3860,20 +3860,34 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource { } private Stream getIndirectPassengersStream() { + if (this.passengers.isEmpty()) { return Stream.of(); } // Paper return this.passengers.stream().flatMap(Entity::getSelfAndPassengers); } @Override public Stream getSelfAndPassengers() { + if (this.passengers.isEmpty()) { return Stream.of(this); } // Paper return Stream.concat(Stream.of(this), this.getIndirectPassengersStream()); } @Override public Stream getPassengersAndSelf() { + if (this.passengers.isEmpty()) { return Stream.of(this); } // Paper return Stream.concat(this.passengers.stream().flatMap(Entity::getPassengersAndSelf), Stream.of(this)); } public Iterable getIndirectPassengers() { + // Paper start - rewrite this method + if (this.passengers.isEmpty()) { return ImmutableList.of(); } + ImmutableList.Builder indirectPassengers = ImmutableList.builder(); + for (Entity passenger : this.passengers) { + indirectPassengers.add(passenger); + indirectPassengers.addAll(passenger.getIndirectPassengers()); + } + return indirectPassengers.build(); + } + private Iterable getIndirectPassengers_old() { + // Paper end return () -> { return this.getIndirectPassengersStream().iterator(); }; @@ -3890,6 +3904,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource { // Paper end - rewrite chunk system public boolean hasExactlyOnePlayerPassenger() { + if (this.passengers.isEmpty()) { return false; } // Paper return this.getIndirectPassengersStream().filter((entity) -> { return entity instanceof Player; }).count() == 1L;