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223 lines
8.8 KiB
Diff
223 lines
8.8 KiB
Diff
From 625ae497ed404e57797c88a005ca4fc2246312c7 Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Mon, 7 Mar 2016 12:51:01 -0700
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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 47c9f69..c5b6a34 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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@@ -5,9 +5,11 @@ import com.google.common.base.Objects;
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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 c;
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- private final int d;
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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 c;
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+ protected int d;
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+ // Paper end
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public BaseBlockPosition(int i, int j, int k) {
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this.a = i;
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@@ -39,17 +41,19 @@ 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 one implementation of these methods (make final)
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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.c;
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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.d;
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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 e7a95f3..2d56f02 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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@@ -207,9 +207,10 @@ public class BlockPosition extends BaseBlockPosition {
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++k;
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}
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- this.b.c = i;
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- this.b.d = j;
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- this.b.e = k;
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+ // Paper start - modify base position variables
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+ ((BaseBlockPosition) this.b).a = i;
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+ ((BaseBlockPosition) this.b).c = j;
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+ ((BaseBlockPosition) this.b).d = k;
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return this.b;
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}
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}
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@@ -228,17 +229,23 @@ public class BlockPosition extends BaseBlockPosition {
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public static final class PooledBlockPosition extends BlockPosition {
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+ // Paper start - remove variables
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+ /*
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private int c;
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private int d;
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private int e;
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+ */
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+ // Paper end
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private boolean f;
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private static final List<BlockPosition.PooledBlockPosition> g = Lists.newArrayList();
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private PooledBlockPosition(int i, int j, int k) {
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super(0, 0, 0);
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- this.c = i;
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- this.d = j;
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- this.e = 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).c = j;
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+ ((BaseBlockPosition) this).d = k;
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+ // Paper end
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}
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public static BlockPosition.PooledBlockPosition s() {
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@@ -279,6 +286,8 @@ public class BlockPosition extends BaseBlockPosition {
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}
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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.c;
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}
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@@ -290,6 +299,8 @@ public class BlockPosition extends BaseBlockPosition {
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public int getZ() {
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return this.e;
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}
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+ */
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+ // Paper end
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public BlockPosition.PooledBlockPosition d(int i, int j, int k) {
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if (this.f) {
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@@ -297,9 +308,11 @@ public class BlockPosition extends BaseBlockPosition {
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this.f = false;
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}
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- this.c = i;
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- this.d = j;
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- this.e = 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).c = j;
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+ ((BaseBlockPosition) this).d = k;
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+ // Paper end
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return this;
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}
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@@ -312,7 +325,7 @@ public class BlockPosition extends BaseBlockPosition {
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}
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public BlockPosition.PooledBlockPosition c(EnumDirection enumdirection) {
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- return this.d(this.c + enumdirection.getAdjacentX(), this.d + enumdirection.getAdjacentY(), this.e + enumdirection.getAdjacentZ());
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+ return this.d(this.getX() + enumdirection.getAdjacentX(), this.getY() + enumdirection.getAdjacentY(), this.getZ() + enumdirection.getAdjacentZ()); // Paper - use getters
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}
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public BaseBlockPosition d(BaseBlockPosition baseblockposition) {
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@@ -322,9 +335,13 @@ public class BlockPosition extends BaseBlockPosition {
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public static final class MutableBlockPosition extends BlockPosition {
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+ // Paper start - remove variables
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+ /*
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private int c;
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private int d;
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private int e;
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+ */
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+ // Paper end
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public MutableBlockPosition() {
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this(0, 0, 0);
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@@ -336,11 +353,15 @@ 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.c = i;
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- this.d = j;
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- this.e = 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).c = j;
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+ ((BaseBlockPosition) this).d = k;
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+ // Paper end
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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.c;
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}
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@@ -352,22 +373,28 @@ public class BlockPosition extends BaseBlockPosition {
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public int getZ() {
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return this.e;
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}
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+ */
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+ // Paper end
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public BlockPosition.MutableBlockPosition c(int i, int j, int k) {
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- this.c = i;
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- this.d = j;
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- this.e = 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).c = j;
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+ ((BaseBlockPosition) this).d = k;
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+ // Paper end
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return this;
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}
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public void c(EnumDirection enumdirection) {
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- this.c += enumdirection.getAdjacentX();
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- this.d += enumdirection.getAdjacentY();
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- this.e += enumdirection.getAdjacentZ();
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+ // Paper start - modify base position variables
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+ ((BaseBlockPosition) this).a += enumdirection.getAdjacentX();
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+ ((BaseBlockPosition) this).c += enumdirection.getAdjacentY();
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+ ((BaseBlockPosition) this).d += enumdirection.getAdjacentZ();
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+ // Paper end
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}
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public void p(int i) {
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- this.d = i;
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+ ((BaseBlockPosition) this).c = i; // Paper - modify base variable
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}
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public BlockPosition h() {
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--
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2.8.0
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