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2f8bdbfde8
we missed something in updating this patch and accidently left hashCode as a 0 value. This caused a pretty nasty performance hit for BlockStateEnum instances as they would be all a hash collision. This update fixes that and also promotes the optimizations to cover ALL cases of Block States, not just enums. While mojang cached hashCode in 1.13, we can still just use a simple large prime based hashCode that auto increments guaranteeing no overlap. Additionally, replace all equals with an identity check.
85 lines
3.6 KiB
Diff
85 lines
3.6 KiB
Diff
From 63f4233aa49d41ab53a84ebd6a20d8d10449855f Mon Sep 17 00:00:00 2001
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From: Alfie Cleveland <alfeh@me.com>
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Date: Fri, 19 Aug 2016 01:52:56 +0100
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Subject: [PATCH] Optimise BlockState's hashCode/equals
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These are singleton "single instance" objects. We can rely on
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object identity checks safely.
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Use a simpler optimized hashcode
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diff --git a/src/main/java/net/minecraft/server/BlockState.java b/src/main/java/net/minecraft/server/BlockState.java
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index d95c0955a9..ea0e0ff4fe 100644
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--- a/src/main/java/net/minecraft/server/BlockState.java
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+++ b/src/main/java/net/minecraft/server/BlockState.java
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@@ -26,23 +26,13 @@ public abstract class BlockState<T extends Comparable<T>> implements IBlockState
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}
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public boolean equals(Object object) {
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- if (this == object) {
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- return true;
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- } else if (!(object instanceof BlockState)) {
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- return false;
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- } else {
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- BlockState<?> blockstate = (BlockState) object;
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-
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- return this.a.equals(blockstate.a) && this.b.equals(blockstate.b);
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- }
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+ return this == object; // Paper - only one instance per configuration
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}
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+ private static java.util.concurrent.atomic.AtomicInteger hashId = new java.util.concurrent.atomic.AtomicInteger(1);// Paper - only one instance per configuration
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+ private final int hashCode = 92821 * hashId.getAndIncrement(); // Paper - only one instance per configuration
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public final int hashCode() {
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- if (this.c == null) {
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- this.c = this.c();
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- }
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-
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- return this.c;
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+ return hashCode; // Paper - only one instance per configuration
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}
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public int c() {
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diff --git a/src/main/java/net/minecraft/server/BlockStateBoolean.java b/src/main/java/net/minecraft/server/BlockStateBoolean.java
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index 4c1d39d67c..71d2ad9703 100644
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--- a/src/main/java/net/minecraft/server/BlockStateBoolean.java
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+++ b/src/main/java/net/minecraft/server/BlockStateBoolean.java
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@@ -28,7 +28,7 @@ public class BlockStateBoolean extends BlockState<Boolean> {
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return obool.toString();
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}
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- public boolean equals(Object object) {
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+ public boolean equals_unused(Object object) { // Paper
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if (this == object) {
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return true;
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} else if (object instanceof BlockStateBoolean && super.equals(object)) {
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diff --git a/src/main/java/net/minecraft/server/BlockStateEnum.java b/src/main/java/net/minecraft/server/BlockStateEnum.java
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index 986b9ccea8..facbf30b4e 100644
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--- a/src/main/java/net/minecraft/server/BlockStateEnum.java
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+++ b/src/main/java/net/minecraft/server/BlockStateEnum.java
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@@ -47,7 +47,7 @@ public class BlockStateEnum<T extends Enum<T> & INamable> extends BlockState<T>
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return ((INamable) t0).getName();
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}
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- public boolean equals(Object object) {
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+ public boolean equals_unused(Object object) { // Paper
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if (this == object) {
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return true;
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} else if (object instanceof BlockStateEnum && super.equals(object)) {
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diff --git a/src/main/java/net/minecraft/server/BlockStateInteger.java b/src/main/java/net/minecraft/server/BlockStateInteger.java
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index 2f12e15e07..613cd0bce2 100644
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--- a/src/main/java/net/minecraft/server/BlockStateInteger.java
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+++ b/src/main/java/net/minecraft/server/BlockStateInteger.java
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@@ -37,7 +37,7 @@ public class BlockStateInteger extends BlockState<Integer> {
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return this.a;
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}
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- public boolean equals(Object object) {
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+ public boolean equals_unused(Object object) { // Paper
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if (this == object) {
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return true;
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} else if (object instanceof BlockStateInteger && super.equals(object)) {
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--
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2.20.1
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