98e7d01ce8
Every call to .isEmpty() made a horribly wasteful map lookup just to get the reference to the Air Item for checking. We will now cache a copy of that item
31 lines
1.4 KiB
Diff
31 lines
1.4 KiB
Diff
From ae097c16d9540ec79890ddb5ba0efe693874621a Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Wed, 21 Dec 2016 03:48:29 -0500
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Subject: [PATCH] Optimize ItemStack.isEmpty()
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Remove hashMap lookup every check, simplify code to remove ternary
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diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
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index c8694e8b9..6db93b953 100644
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--- a/src/main/java/net/minecraft/server/ItemStack.java
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+++ b/src/main/java/net/minecraft/server/ItemStack.java
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@@ -112,9 +112,15 @@ public final class ItemStack {
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this.F();
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}
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+ // Paper start - optimize isEmpty
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+ private static Item airItem;
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public boolean isEmpty() {
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- 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);
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+ if (airItem == null) {
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+ airItem = Item.REGISTRY.get(new MinecraftKey("air"));
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+ }
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+ return this == ItemStack.a || this.item == null || this.item == airItem || (this.count <= 0 || (this.damage < -32768 || this.damage > '\uffff'));
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}
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+ // Paper end
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public static void a(DataConverterManager dataconvertermanager) {
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dataconvertermanager.a(DataConverterTypes.ITEM_INSTANCE, (DataInspector) (new DataInspectorBlockEntity()));
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--
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2.11.0
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