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Fix issues with IntIdentityHashBiMiap

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Jason Penilla 2021-11-23 16:43:50 -08:00
parent c03b8b99e3
commit ddf004bd5e
1 changed files with 0 additions and 65 deletions
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patches/server/Optimize-IntIdentityHashBiMiap-nextId.patch
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@ -1,65 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Mon, 23 Jul 2018 13:08:19 -0400
Subject: [PATCH] Optimize IntIdentityHashBiMiap#nextId()
Optimizes CrudeIncrementalIntIdentityHashBiMap#nextId()
This is a frequent hotspot for world loading/saving.
diff --git a/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java b/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
+++ b/src/main/java/net/minecraft/util/CrudeIncrementalIntIdentityHashBiMap.java
@@ -0,0 +0,0 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
private K[] byId;
private int nextId;
private int size;
+ private java.util.BitSet usedIds; // Paper
private CrudeIncrementalIntIdentityHashBiMap(int size) {
this.keys = (K[])(new Object[size]);
this.values = new int[size];
this.byId = (K[])(new Object[size]);
+ this.usedIds = new java.util.BitSet(); // Paper
}
public static <A> CrudeIncrementalIntIdentityHashBiMap<A> create(int expectedSize) {
@@ -0,0 +0,0 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
}
private int nextId() {
+ /* // Paper start
while(this.nextId < this.byId.length && this.byId[this.nextId] != null) {
++this.nextId;
}
+ */
+ this.nextId = this.usedIds.nextClearBit(0);
+ // Paper end
return this.nextId;
}
@@ -0,0 +0,0 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
this.byId = crudeIncrementalIntIdentityHashBiMap.byId;
this.nextId = crudeIncrementalIntIdentityHashBiMap.nextId;
this.size = crudeIncrementalIntIdentityHashBiMap.size;
+ this.usedIds.clear(); // Paper
}
public void addMapping(K value, int id) {
@@ -0,0 +0,0 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
this.keys[k] = value;
this.values[k] = id;
this.byId[id] = value;
+ this.usedIds.set(id); // Paper
++this.size;
if (id == this.nextId) {
++this.nextId;
@@ -0,0 +0,0 @@ public class CrudeIncrementalIntIdentityHashBiMap<K> implements IdMap<K> {
Arrays.fill(this.byId, (Object)null);
this.nextId = 0;
this.size = 0;
+ this.usedIds.clear(); // Paper
}
@Override