157 Zeilen
6.1 KiB
Diff
157 Zeilen
6.1 KiB
Diff
From 08d6547e66d3c8f7ad0fab9e4bde4741c2ca1386 Mon Sep 17 00:00:00 2001
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From: Techcable <Techcable@outlook.com>
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Date: Fri, 29 Jan 2016 03:24:21 -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 0b2277c..a685e08 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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+ // PaperSpigot start - Make mutable and protected for MutableBlockPos
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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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+ // PaperSpigot 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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+ // PaperSpigot 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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+ // PaperSpigot 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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@@ -79,7 +83,8 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
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return Objects.toStringHelper(this).add("x", this.getX()).add("y", this.getY()).add("z", this.getZ()).toString();
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}
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- public int compareTo(Object object) {
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+ // Paperspigot - Signature change, Object -> BaseBlockPosition
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+ public int compareTo(BaseBlockPosition object) {
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return this.g((BaseBlockPosition) object);
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}
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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 2bd5499..0d0e0ab 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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@@ -198,9 +198,11 @@ 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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+ // PaperSpigot start
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+ this.b.setX(i);
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+ this.b.setY(j);
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+ this.b.setZ(k);
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+ // PaperSpigot stop
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return this.b;
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}
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}
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@@ -219,9 +221,25 @@ public class BlockPosition extends BaseBlockPosition {
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public static final class MutableBlockPosition extends BlockPosition {
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+ // PaperSpigot start - remove our overriding 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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+
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+ public void setX(int x) {
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+ ((BaseBlockPosition) this).a = x;
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+ }
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+
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+ public void setY(int y) {
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+ ((BaseBlockPosition) this).c = y;
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+ }
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+
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+ public void setZ(int z) {
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+ ((BaseBlockPosition) this).d = z;
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+ }
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+ // PaperSpigot end
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public MutableBlockPosition() {
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this(0, 0, 0);
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@@ -229,11 +247,13 @@ 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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+ // PaperSpigot start - modify base x,y,z
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+ this.setX(i);
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+ this.setY(j);
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+ this.setZ(k);
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}
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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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@@ -245,11 +265,13 @@ 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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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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+ setX(i);
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+ setY(j);
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+ setZ(k);
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+ // PaperSpigot end
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return this;
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}
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--
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2.7.0.windows.2
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