64 lines
2.5 KiB
Diff
64 lines
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Wed, 30 Nov 2016 20:56:58 -0600
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Subject: [PATCH] Improve BlockPosition inlining
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Normally the JVM can inline virtual getters by having two sets of code, one is the 'optimized' code and the other is the 'deoptimized' code.
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If a single type is used 99% of the time, then its worth it to inline, and to revert to 'deoptimized' the 1% of the time we encounter other types.
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But if two types are encountered commonly, then the JVM can't inline them both, and the call overhead remains.
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This scenario also occurs with BlockPos and MutableBlockPos.
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The variables in BlockPos are final, so MutableBlockPos can't modify them.
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MutableBlockPos fixes this by adding custom mutable variables, and overriding the getters to access them.
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This approach with utility methods that operate on MutableBlockPos and BlockPos.
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Specific examples are BlockPosition.up(), and World.isValidLocation().
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It makes these simple methods much slower than they need to be.
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This should result in an across the board speedup in anything that accesses blocks or does logic with positions.
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This is based upon conclusions drawn from inspecting the assenmbly generated bythe JIT compiler on my microbenchmarks.
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They had 'callq' (invoke) instead of 'mov' (get from memory) instructions.
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diff --git a/src/main/java/net/minecraft/core/Vec3i.java b/src/main/java/net/minecraft/core/Vec3i.java
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index c66ae4d9eea993f3b7fcc6e253259db3346229d1..ea496a990e7e49bc83f7a8b98f71f2b11d9fc56c 100644
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--- a/src/main/java/net/minecraft/core/Vec3i.java
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+++ b/src/main/java/net/minecraft/core/Vec3i.java
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@@ -41,7 +41,7 @@ public class Vec3i implements Comparable<Vec3i> {
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}
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@Override
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- public boolean equals(Object object) {
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+ public final boolean equals(Object object) { // Paper
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if (this == object) {
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return true;
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} else if (!(object instanceof Vec3i)) {
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@@ -59,7 +59,7 @@ public class Vec3i implements Comparable<Vec3i> {
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}
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@Override
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- public int hashCode() {
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+ public final int hashCode() { // Paper
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return (this.getY() + this.getZ() * 31) * 31 + this.getX();
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}
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@@ -72,15 +72,15 @@ public class Vec3i implements Comparable<Vec3i> {
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}
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}
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- public int getX() {
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+ public final int getX() { // Paper
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return this.x;
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}
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- public int getY() {
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+ public final int getY() { // Paper
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return this.y;
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}
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- public int getZ() {
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+ public final int getZ() { // Paper
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return this.z;
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}
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