76 lines
3.6 KiB
Diff
76 lines
3.6 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/server/BaseBlockPosition.java b/src/main/java/net/minecraft/server/BaseBlockPosition.java
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index 8b202b342f899a38b989b683bd8be4f5c4061f48..1842e69839a65e7b8d2c47fd30ec8f3179f04470 100644
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--- a/src/main/java/net/minecraft/server/BaseBlockPosition.java
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+++ b/src/main/java/net/minecraft/server/BaseBlockPosition.java
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@@ -39,7 +39,7 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
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this(MathHelper.floor(d0), MathHelper.floor(d1), MathHelper.floor(d2));
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}
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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 BaseBlockPosition)) {
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@@ -51,7 +51,7 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
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}
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}
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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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@@ -59,15 +59,15 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
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return this.getY() == baseblockposition.getY() ? (this.getZ() == baseblockposition.getZ() ? this.getX() - baseblockposition.getX() : this.getZ() - baseblockposition.getZ()) : this.getY() - baseblockposition.getY();
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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.a;
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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.b;
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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.e;
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}
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diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
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index f1ad6ad22a59b28d2e8aeb2c0f4c21bce6070bc5..48410cfbfe203dbe533294a7e4f261dba9c327cb 100644
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--- a/src/main/java/net/minecraft/server/BlockPosition.java
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+++ b/src/main/java/net/minecraft/server/BlockPosition.java
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@@ -81,6 +81,7 @@ public class BlockPosition extends BaseBlockPosition {
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return a(this.getX(), this.getY(), this.getZ());
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}
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+ public static long asLong(int x, int y, int z) { return a(x, y, z); } // Paper - OBFHELPER
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public static long a(int i, int j, int k) {
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long l = 0L;
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