207 lines
8.5 KiB
Diff
207 lines
8.5 KiB
Diff
From a6489b7ad504d1f5609ff1cf0e3c86f25eac0ba0 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 58f8b4b72..98992513d 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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@@ -7,22 +7,22 @@ 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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+ protected int x;
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+ protected int y;
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+ protected int z;
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public boolean isValidLocation() {
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- return a >= -30000000 && c >= -30000000 && a < 30000000 && c < 30000000 && b >= 0 && b < 256;
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+ return x >= -30000000 && z >= -30000000 && x < 30000000 && z < 30000000 && y >= 0 && y < 256;
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}
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public boolean isInvalidYLocation() {
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- return b < 0 || b >= 256;
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+ return y < 0 || y >= 256;
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}
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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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- this.b = j;
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- this.c = k;
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+ this.x = i;
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+ this.y = j;
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+ this.z = k;
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}
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public BaseBlockPosition(double d0, double d1, double d2) {
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@@ -49,17 +49,19 @@ 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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- return this.a;
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+ // Paper start
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+ public final int getX() {
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+ return this.x;
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}
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public int getY() {
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- return this.b;
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+ return this.y;
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}
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public int getZ() {
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- return this.c;
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+ return this.z;
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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 252e00e16..f769b178c 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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@@ -207,18 +207,20 @@ public class BlockPosition extends BaseBlockPosition {
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if (this.g == null) {
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this.g = new BlockPosition.MutableBlockPosition(i, j, k);
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return this.g;
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- } else if (this.g.b == l && this.g.c == i1 && this.g.d == j1) {
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+ } else if (this.g.x == l && this.g.y == i1 && this.g.z == j1) { // Paper
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return (BlockPosition.MutableBlockPosition) this.endOfData();
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} else {
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- if (this.g.b < l) {
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- ++this.g.b;
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- } else if (this.g.c < i1) {
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- this.g.b = i; // Paper - Readd line removed by the decompiler
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- ++this.g.c;
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- } else if (this.g.d < j1) {
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- this.g.b = i; // Paper - Readd line removed by the decompiler
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- this.g.c = j; // Paper - Readd line removed by the decompiler
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- ++this.g.d;
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+ // Paper start - use xyz
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+ if (this.g.x < l) {
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+ ++this.g.x;
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+ } else if (this.g.y < i1) {
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+ this.g.x = i; // Paper - Readd line removed by the decompiler
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+ ++this.g.y;
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+ } else if (this.g.z < j1) {
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+ this.g.x = i; // Paper - Readd line removed by the decompiler
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+ this.g.y = j; // Paper - Readd line removed by the decompiler
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+ ++this.g.z;
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+ // Paper end
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}
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return this.g;
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@@ -338,10 +340,12 @@ public class BlockPosition extends BaseBlockPosition {
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public static class MutableBlockPosition extends BlockPosition {
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+ // Paper start - comment out
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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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- // Paper start
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+
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@Override
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public boolean isValidLocation() {
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return b >= -30000000 && d >= -30000000 && b < 30000000 && d < 30000000 && c >= 0 && c < 256;
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@@ -350,6 +354,7 @@ 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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@@ -361,10 +366,13 @@ public class BlockPosition extends BaseBlockPosition {
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}
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public MutableBlockPosition(int i, int j, int k) {
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- super(0, 0, 0);
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+ // Paper start
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+ super(i, j, k);
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+ /*
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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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+ this.d = 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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@@ -383,6 +391,8 @@ public class BlockPosition extends BaseBlockPosition {
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return super.a(enumblockrotation).h();
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}
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+ /*
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+ // Paper start - use parent getters
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public int getX() {
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return this.b;
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}
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@@ -393,13 +403,16 @@ 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 BlockPosition.MutableBlockPosition setValues(int i, int j, int k) { return c(i, j, k);} // 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 - use xyz
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+ this.x = i;
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+ this.y = j;
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+ this.z = k;
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+ // Paper end
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return this;
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}
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@@ -417,15 +430,15 @@ 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(x + enumdirection.getAdjacentX() * i, y + enumdirection.getAdjacentY() * i, z + enumdirection.getAdjacentZ() * i); // Paper - use xyz
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}
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public BlockPosition.MutableBlockPosition d(int i, int j, int k) {
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- return this.c(this.b + i, this.c + j, this.d + k);
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+ return this.c(x + i, y + j, z + k); // Paper - use xyz
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}
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public void p(int i) {
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- this.c = i;
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+ this.y = i; // Paper change to y
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}
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public BlockPosition h() {
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--
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2.18.0
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