18c3716c49
This enables us a fast reference to the entities current chunk instead of having to look it up by hashmap lookups. We also store counts by type to further enable other performance optimizations in later patches.
32 lines
1.4 KiB
Diff
32 lines
1.4 KiB
Diff
From a1b931dcc9fc5937954696bacf2349dcc5b9d57a 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 5047a57e9..736686bed 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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@@ -144,9 +144,15 @@ 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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2.18.0
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