geforkt von Mirrors/Paper
4104545b11
"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
64 Zeilen
2.5 KiB
Diff
64 Zeilen
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 e188f130e47ef319477050981de53a7410452592..5e09890ba2fe326503a49b2dbec09845f5c8c5eb 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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