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Paper/Spigot-Server-Patches/0306-Optimize-RegistryID.c.patch
Aikar fa254d2142
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2018-08-17 18:01:37 -04:00

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From 4c81bab2e17f5e9c8afb165cab5b58681596325c 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 RegistryID.c()
This is a frequent hotspot for world loading/saving.
diff --git a/src/main/java/net/minecraft/server/RegistryID.java b/src/main/java/net/minecraft/server/RegistryID.java
index bde5714dd..a01cda9d8 100644
--- a/src/main/java/net/minecraft/server/RegistryID.java
+++ b/src/main/java/net/minecraft/server/RegistryID.java
@@ -14,12 +14,14 @@ public class RegistryID<K> implements Registry { // Paper - decompile fix
private K[] d;
private int e;
private int f;
+ private java.util.BitSet usedIds; // Paper
public RegistryID(int i) {
i = (int) ((float) i / 0.8F);
this.b = (K[]) (new Object[i]); // Paper - decompile fix
this.c = new int[i];
this.d = (K[]) (new Object[i]); // Paper - decompile fix
+ this.usedIds = new java.util.BitSet(); // Paper
}
public int getId(@Nullable K k0) {
@@ -43,9 +45,14 @@ public class RegistryID<K> implements Registry { // Paper - decompile fix
}
private int c() {
+ // Paper start
+ /*
while (this.e < this.d.length && this.d[this.e] != null) {
++this.e;
}
+ */
+ this.e = this.usedIds.nextClearBit(0);
+ // Paper end
return this.e;
}
@@ -59,6 +66,7 @@ public class RegistryID<K> implements Registry { // Paper - decompile fix
this.d = (K[]) (new Object[i]); // Paper - decompile fix
this.e = 0;
this.f = 0;
+ this.usedIds.clear(); // Paper
for (int j = 0; j < aobject.length; ++j) {
if (aobject[j] != null) {
@@ -84,6 +92,7 @@ public class RegistryID<K> implements Registry { // Paper - decompile fix
this.b[k] = k0;
this.c[k] = i;
this.d[i] = k0;
+ this.usedIds.set(i); // Paper
++this.f;
if (i == this.e) {
++this.e;
@@ -148,6 +157,7 @@ public class RegistryID<K> implements Registry { // Paper - decompile fix
Arrays.fill(this.d, (Object) null);
this.e = 0;
this.f = 0;
+ this.usedIds.clear(); // Paper
}
public int b() {
--
2.18.0