First look at shared EntityEventBroadcaster,

this improves performance in PvP servers and other areas where lots of players or entities exist in one space.

fixes #5622

src/network/mcpe/EntityEventBroadcaster.php

@@ -0,0 +1,93 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\network\mcpe;
+
+use pocketmine\entity\Attribute;
+use pocketmine\entity\effect\EffectInstance;
+use pocketmine\entity\Entity;
+use pocketmine\entity\Human;
+use pocketmine\entity\Living;
+use pocketmine\network\mcpe\protocol\types\entity\MetadataProperty;
+
+/**
+ * This class allows broadcasting entity events to many viewers on the server network.
+ */
+interface EntityEventBroadcaster{
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 * @param Attribute[]      $attributes
+	 */
+	public function syncAttributes(array $recipients, Living $entity, array $attributes) : void;
+
+	/**
+	 * @param NetworkSession[]   $recipients
+	 * @param MetadataProperty[] $properties
+	 *
+	 * @phpstan-param array<int, MetadataProperty> $properties
+	 */
+	public function syncActorData(array $recipients, Entity $entity, array $properties) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onEntityEffectAdded(array $recipients, Living $entity, EffectInstance $effect, bool $replacesOldEffect) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onEntityEffectRemoved(array $recipients, Living $entity, EffectInstance $effect) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onEntityRemoved(array $recipients, Entity $entity) : void;
+
+	/**
+	 * TODO: expand this to more than just humans
+	 *
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onMobMainHandItemChange(array $recipients,Human $mob) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onMobOffHandItemChange(array $recipients, Human $mob) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onMobArmorChange(array $recipients, Living $mob) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onPickUpItem(array $recipients, Entity $collector, Entity $pickedUp) : void;
+
+	/**
+	 * @param NetworkSession[] $recipients
+	 */
+	public function onEmote(array $recipients, Human $from, string $emoteId) : void;
+}