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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
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 e3647763bcede42f06250550985e149e39f2b0b8..f93e74226e3306a59e17dce1e4f8e72d61d75d49 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -3842,20 +3842,34 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
}
private Stream<Entity> getIndirectPassengersStream() {
+ if (this.passengers.isEmpty()) { return Stream.of(); } // Paper - Optimize indirect passenger iteration
return this.passengers.stream().flatMap(Entity::getSelfAndPassengers);
}
@Override
public Stream<Entity> getSelfAndPassengers() {
+ if (this.passengers.isEmpty()) { return Stream.of(this); } // Paper - Optimize indirect passenger iteration
return Stream.concat(Stream.of(this), this.getIndirectPassengersStream());
}
@Override
public Stream<Entity> getPassengersAndSelf() {
+ if (this.passengers.isEmpty()) { return Stream.of(this); } // Paper - Optimize indirect passenger iteration
return Stream.concat(this.passengers.stream().flatMap(Entity::getPassengersAndSelf), Stream.of(this));
}
public Iterable<Entity> getIndirectPassengers() {
+ // Paper start - Optimize indirect passenger iteration
+ if (this.passengers.isEmpty()) { return ImmutableList.of(); }
+ ImmutableList.Builder<Entity> indirectPassengers = ImmutableList.builder();
+ for (Entity passenger : this.passengers) {
+ indirectPassengers.add(passenger);
+ indirectPassengers.addAll(passenger.getIndirectPassengers());
+ }
+ return indirectPassengers.build();
+ }
+ private Iterable<Entity> getIndirectPassengers_old() {
+ // Paper end - Optimize indirect passenger iteration
return () -> {
return this.getIndirectPassengersStream().iterator();
};
@@ -3868,6 +3882,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
}
public boolean hasExactlyOnePlayerPassenger() {
+ if (this.passengers.isEmpty()) { return false; } // Paper - Optimize indirect passenger iteration
return this.countPlayerPassengers() == 1;
}
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