From b70ebdb4c08ced933b85774c1a3a4955a976059a Mon Sep 17 00:00:00 2001 From: Aikar Date: Wed, 21 Dec 2016 03:48:29 -0500 Subject: [PATCH] Optimize ItemStack.isEmpty() Remove hashMap lookup every check, simplify code to remove ternary diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java index 5047a57e9..736686bed 100644 --- a/src/main/java/net/minecraft/server/ItemStack.java +++ b/src/main/java/net/minecraft/server/ItemStack.java @@ -144,9 +144,15 @@ public final class ItemStack { this.F(); } + // Paper start - optimize isEmpty + private static Item airItem; public boolean isEmpty() { - return this == ItemStack.a ? true : (this.item != null && this.item != Item.getItemOf(Blocks.AIR) ? (this.count <= 0 ? true : this.damage < -32768 || this.damage > '\uffff') : true); + if (airItem == null) { + airItem = Item.REGISTRY.get(new MinecraftKey("air")); + } + return this == ItemStack.a || this.item == null || this.item == airItem || (this.count <= 0 || (this.damage < -32768 || this.damage > '\uffff')); } + // Paper end public static void a(DataConverterManager dataconvertermanager) { dataconvertermanager.a(DataConverterTypes.ITEM_INSTANCE, (DataInspector) (new DataInspectorBlockEntity())); -- 2.18.0