163 lines
6.9 KiB
Diff
163 lines
6.9 KiB
Diff
From 3e498c8197d48f4f8cdb709c7f7e980a54ae9af1 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] Speedup BlockPos by fixing 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 mircorbenchmarks.
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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 f772c7c..f5dc144 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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@@ -7,11 +7,12 @@ import javax.annotation.concurrent.Immutable;
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public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
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public static final BaseBlockPosition ZERO = new BaseBlockPosition(0, 0, 0);
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- private final int a;
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- private final int b;
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- private final int c;
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- // Paper start
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- public boolean isValidLocation() {
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+ // Paper start - Make mutable and protected for MutableBlockPos and PooledBlockPos
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+ protected int a;
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+ protected int b;
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+ protected int c;
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+
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+ public final boolean isValidLocation() {
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return a >= -30000000 && c >= -30000000 && a < 30000000 && c < 30000000 && b >= 0 && b < 256;
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}
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public boolean isInvalidYLocation() {
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@@ -49,17 +50,19 @@ 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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+ // Paper start - Only allow a single implementation
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+ public final int getX() {
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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() {
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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() {
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return this.c;
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}
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+ // Paper end
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public BaseBlockPosition d(BaseBlockPosition baseblockposition) {
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return new BaseBlockPosition(this.getY() * baseblockposition.getZ() - this.getZ() * baseblockposition.getY(), this.getZ() * baseblockposition.getX() - this.getX() * baseblockposition.getZ(), this.getX() * baseblockposition.getY() - this.getY() * baseblockposition.getX());
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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 6c14061..c258331 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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@@ -254,9 +254,9 @@ public class BlockPosition extends BaseBlockPosition {
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}
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// Paper end
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- this.b.b = i;
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- this.b.c = j;
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- this.b.d = k;
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+ ((BaseBlockPosition) this.b).a = i;
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+ ((BaseBlockPosition) this.b).b = j;
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+ ((BaseBlockPosition) this.b).c = k;
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return this.b;
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}
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}
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@@ -370,6 +370,8 @@ public class BlockPosition extends BaseBlockPosition {
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public static class MutableBlockPosition extends BlockPosition {
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+ // Paper start - Remove variables
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+ /*
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protected int b;
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protected int c;
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protected int d;
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@@ -382,6 +384,7 @@ public class BlockPosition extends BaseBlockPosition {
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public boolean isInvalidYLocation() {
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return c < 0 || c >= 256;
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}
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+ */
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// Paper end
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public MutableBlockPosition() {
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@@ -394,9 +397,11 @@ public class BlockPosition extends BaseBlockPosition {
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public MutableBlockPosition(int i, int j, int k) {
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super(0, 0, 0);
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- this.b = i;
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- this.c = j;
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- this.d = k;
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+ // Paper start - Modify base position variables
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+ ((BaseBlockPosition) this).a = i;
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+ ((BaseBlockPosition) this).b = j;
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+ ((BaseBlockPosition) this).c = k;
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+ // Paper end
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}
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public BlockPosition a(double d0, double d1, double d2) {
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@@ -415,6 +420,8 @@ public class BlockPosition extends BaseBlockPosition {
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return super.a(enumblockrotation).h();
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}
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+ // Paper start - Use superclass methods
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+ /*
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public int getX() {
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return this.b;
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}
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@@ -426,12 +433,16 @@ public class BlockPosition extends BaseBlockPosition {
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public int getZ() {
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return this.d;
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}
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+ */
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+ // Paper end
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public void setValues(int x, int y, int z) { c(x, y, z); } // Paper - OBFHELPER
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public BlockPosition.MutableBlockPosition c(int i, int j, int k) {
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- this.b = i;
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- this.c = j;
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- this.d = k;
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+ // Paper start - Modify base position variables
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+ ((BaseBlockPosition) this).a = i;
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+ ((BaseBlockPosition) this).b = j;
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+ ((BaseBlockPosition) this).c = k;
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+ // Paper end
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return this;
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}
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@@ -448,11 +459,11 @@ public class BlockPosition extends BaseBlockPosition {
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}
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public BlockPosition.MutableBlockPosition c(EnumDirection enumdirection, int i) {
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- return this.c(this.b + enumdirection.getAdjacentX() * i, this.c + enumdirection.getAdjacentY() * i, this.d + enumdirection.getAdjacentZ() * i);
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+ return this.c(this.getX() + enumdirection.getAdjacentX() * i, this.getY() + enumdirection.getAdjacentY() * i, this.getZ() + enumdirection.getAdjacentZ() * i); // Paper - USE THE BLEEPING GETTERS
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}
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public void p(int i) {
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- this.c = i;
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+ ((BaseBlockPosition) this).b = i; // Paper - Modify base variable
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}
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public BlockPosition h() {
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--
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2.10.2
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