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Paper/Spigot-Server-Patches/0108-Optimise-BlockState-s-hashCode-equals.patch
Gabscap 7ae47d4eb3
[CI-SKIP] Remove Waving banner fix (#4786)
Mojang fixed it in MC-63720
2020-11-19 10:15:16 -05:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alfie Cleveland <alfeh@me.com>
Date: Fri, 19 Aug 2016 01:52:56 +0100
Subject: [PATCH] Optimise BlockState's hashCode/equals
These are singleton "single instance" objects. We can rely on
object identity checks safely.
Use a simpler optimized hashcode
diff --git a/src/main/java/net/minecraft/server/BlockStateBoolean.java b/src/main/java/net/minecraft/server/BlockStateBoolean.java
index 8df150f4cabb3dd98cb66c9d1af7fae035a6a6fe..4ca8db630434915de4eaeac6c4ecd60714d7f5d9 100644
--- a/src/main/java/net/minecraft/server/BlockStateBoolean.java
+++ b/src/main/java/net/minecraft/server/BlockStateBoolean.java
@@ -30,8 +30,7 @@ public class BlockStateBoolean extends IBlockState<Boolean> {
return obool.toString();
}
- @Override
- public boolean equals(Object object) {
+ public boolean equals_unused(Object object) { // Paper
if (this == object) {
return true;
} else if (object instanceof BlockStateBoolean && super.equals(object)) {
diff --git a/src/main/java/net/minecraft/server/BlockStateEnum.java b/src/main/java/net/minecraft/server/BlockStateEnum.java
index 8162c11d14b8e88c2b572f9ddf6b7a15977047f8..8dc620b22bb904aa6a82e2127aa9da861986525c 100644
--- a/src/main/java/net/minecraft/server/BlockStateEnum.java
+++ b/src/main/java/net/minecraft/server/BlockStateEnum.java
@@ -49,8 +49,7 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends IBlockState<T>
return ((INamable) t0).getName();
}
- @Override
- public boolean equals(Object object) {
+ public boolean equals_unused(Object object) { // Paper
if (this == object) {
return true;
} else if (object instanceof BlockStateEnum && super.equals(object)) {
diff --git a/src/main/java/net/minecraft/server/BlockStateInteger.java b/src/main/java/net/minecraft/server/BlockStateInteger.java
index 5bd7a236b948666ca31e53cb3a8aa0dc147e274b..36b84446e96faefad3b783f73df74e0f3bce8255 100644
--- a/src/main/java/net/minecraft/server/BlockStateInteger.java
+++ b/src/main/java/net/minecraft/server/BlockStateInteger.java
@@ -38,8 +38,7 @@ public class BlockStateInteger extends IBlockState<Integer> {
return this.a;
}
- @Override
- public boolean equals(Object object) {
+ public boolean equals_unused(Object object) { // Paper
if (this == object) {
return true;
} else if (object instanceof BlockStateInteger && super.equals(object)) {
diff --git a/src/main/java/net/minecraft/server/IBlockState.java b/src/main/java/net/minecraft/server/IBlockState.java
index d63a4e4916ed5f5d901be0f4dd2c13cf66239055..6550b55067db31dbbc903fe17a13849383651c5a 100644
--- a/src/main/java/net/minecraft/server/IBlockState.java
+++ b/src/main/java/net/minecraft/server/IBlockState.java
@@ -59,23 +59,17 @@ public abstract class IBlockState<T extends Comparable<T>> {
}
public boolean equals(Object object) {
- if (this == object) {
- return true;
- } else if (!(object instanceof IBlockState)) {
- return false;
- } else {
- IBlockState<?> iblockstate = (IBlockState) object;
-
- return this.a.equals(iblockstate.a) && this.b.equals(iblockstate.b);
- }
+ return this == object; // Paper - only one instance per configuration
}
+ private static final java.util.concurrent.atomic.AtomicInteger hashId = new java.util.concurrent.atomic.AtomicInteger(1); // Paper - only one instance per configuration
+ private final int hashCode = 92821 * hashId.getAndIncrement(); // Paper - only one instance per configuration
public final int hashCode() {
if (this.c == null) {
this.c = this.b();
}
- return this.c;
+ return this.hashCode; // Paper - only one instance per configuration
}
public int b() {