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28 lines
1.4 KiB
Diff
28 lines
1.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paul <paul@technove.co>
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Date: Tue, 29 Jun 2021 02:24:23 -0500
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Subject: [PATCH] Skip cloning loot parameters
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Small improvement in CPU, much larger improvement in allocations. As a
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new loot context is created every time a player moves (along with a lot
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of other times) the constant cloning churns out a lot of useless
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objects.
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diff --git a/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java b/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
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index 05b64f2730bfe836bd1d72dcfccd9f536908a099..39e941a6a315e2a9fc0f47eb39ef9d2b58069f90 100644
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--- a/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
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+++ b/src/main/java/net/minecraft/world/level/storage/loot/LootContext.java
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@@ -41,8 +41,10 @@ public class LootContext {
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this.level = world;
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this.lootTables = tableGetter;
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this.conditions = conditionGetter;
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- this.params = ImmutableMap.copyOf(parameters);
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- this.dynamicDrops = ImmutableMap.copyOf(drops);
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+ // Airplane start - use unmodifiable maps instead of immutable ones to skip the copy
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+ this.params = java.util.Collections.unmodifiableMap(parameters);
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+ this.dynamicDrops = java.util.Collections.unmodifiableMap(drops);
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+ // Airplane end
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}
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public boolean hasParam(LootContextParam<?> parameter) {
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