67 Zeilen
2.5 KiB
Diff
67 Zeilen
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrew Steinborn <git@steinborn.me>
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Date: Mon, 23 Jul 2018 13:08:19 -0400
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Subject: [PATCH] Optimize IntIdentityHashBiMiap#nextId()
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Optimizes CrudeIncrementalIntIdentityHashBiMap#nextId()
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This is a frequent hotspot for world loading/saving.
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diff --git a/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java b/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
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index feaa9572a450b88a26659d850a269d09465259ee..62440dbb35263cddc90ba594c3d5777d7643e527 100644
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--- a/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
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+++ b/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
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@@ -16,12 +16,14 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
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private K[] byId;
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private int nextId;
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private int size;
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+ private java.util.BitSet usedIds; // Paper
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public CrudeIncrementalIntIdentityHashBiMap(int size) {
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size = (int)((float)size / 0.8F);
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this.keys = (K[])(new Object[size]);
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this.values = new int[size];
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this.byId = (K[])(new Object[size]);
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+ this.usedIds = new java.util.BitSet(); // Paper
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}
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@Override
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@@ -54,9 +56,13 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
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}
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private int nextId() {
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+ /* // Paper start
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while(this.nextId < this.byId.length && this.byId[this.nextId] != null) {
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++this.nextId;
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}
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+ */
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+ this.nextId = this.usedIds.nextClearBit(0);
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+ // Paper end
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return this.nextId;
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}
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@@ -69,6 +75,7 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
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this.byId = (K[])(new Object[newSize]);
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this.nextId = 0;
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this.size = 0;
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+ this.usedIds.clear(); // Paper
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for(int i = 0; i < objects.length; ++i) {
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if (objects[i] != null) {
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@@ -92,6 +99,7 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
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this.keys[k] = value;
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this.values[k] = id;
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this.byId[id] = value;
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+ this.usedIds.set(id); // Paper
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++this.size;
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if (id == this.nextId) {
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++this.nextId;
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@@ -153,6 +161,7 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
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Arrays.fill(this.byId, (Object)null);
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this.nextId = 0;
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this.size = 0;
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+ this.usedIds.clear(); // Paper
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}
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public int size() {
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