Paper/Spigot-Server-Patches/0253-Speedup-BlockPos-by-fixing-inlining.patch
Aikar e4d10a6d67
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
122289ff Add FaceAttachable interface to handle Grindstone facing in common with Switches
a6db750e SPIGOT-5647: ZombieVillager entity should have getVillagerType()

CraftBukkit Changes:
bbe3d58e SPIGOT-5650: Lectern.setPage(int) causes a NullPointerException
3075579f Add FaceAttachable interface to handle Grindstone facing in common with Switches
95bd4238 SPIGOT-5647: ZombieVillager entity should have getVillagerType()
4d975ac3 SPIGOT-5617: setBlockData does not work when NotPlayEvent is called by redstone current
2020-04-02 17:09:17 -04:00

214 lines
8.7 KiB
Diff

From 00af267858cee1ef342078231c7d1d227ae4c399 Mon Sep 17 00:00:00 2001
From: Techcable <Techcable@outlook.com>
Date: Wed, 30 Nov 2016 20:56:58 -0600
Subject: [PATCH] Speedup BlockPos by fixing inlining
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.
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.
But if two types are encountered commonly, then the JVM can't inline them both, and the call overhead remains.
This scenario also occurs with BlockPos and MutableBlockPos.
The variables in BlockPos are final, so MutableBlockPos can't modify them.
MutableBlockPos fixes this by adding custom mutable variables, and overriding the getters to access them.
This approach with utility methods that operate on MutableBlockPos and BlockPos.
Specific examples are BlockPosition.up(), and World.isValidLocation().
It makes these simple methods much slower than they need to be.
This should result in an across the board speedup in anything that accesses blocks or does logic with positions.
This is based upon conclusions drawn from inspecting the assenmbly generated bythe JIT compiler on my mircorbenchmarks.
They had 'callq' (invoke) instead of 'mov' (get from memory) instructions.
diff --git a/src/main/java/net/minecraft/server/BaseBlockPosition.java b/src/main/java/net/minecraft/server/BaseBlockPosition.java
index 71089442c1..c439a8d019 100644
--- a/src/main/java/net/minecraft/server/BaseBlockPosition.java
+++ b/src/main/java/net/minecraft/server/BaseBlockPosition.java
@@ -7,25 +7,22 @@ import javax.annotation.concurrent.Immutable;
public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
public static final BaseBlockPosition ZERO = new BaseBlockPosition(0, 0, 0);
- @Deprecated
- private final int a;
- @Deprecated
- private final int b;
- @Deprecated
- private final int c;
// Paper start
+ protected int x;
+ protected int y;
+ protected int z;
public boolean isValidLocation() {
- return a >= -30000000 && c >= -30000000 && a < 30000000 && c < 30000000 && b >= 0 && b < 256;
+ return x >= -30000000 && z >= -30000000 && x < 30000000 && z < 30000000 && y >= 0 && y < 256;
}
public boolean isInvalidYLocation() {
- return b < 0 || b >= 256;
+ return y < 0 || y >= 256;
}
// Paper end
public BaseBlockPosition(int i, int j, int k) {
- this.a = i;
- this.b = j;
- this.c = k;
+ this.x = i;
+ this.y = j;
+ this.z = k;
}
public BaseBlockPosition(double d0, double d1, double d2) {
@@ -52,16 +49,17 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
return this.getY() == baseblockposition.getY() ? (this.getZ() == baseblockposition.getZ() ? this.getX() - baseblockposition.getX() : this.getZ() - baseblockposition.getZ()) : this.getY() - baseblockposition.getY();
}
- public int getX() {
- return this.a;
+ // Paper start
+ public final int getX() {
+ return this.x;
}
public int getY() {
- return this.b;
+ return this.y;
}
public int getZ() {
- return this.c;
+ return this.z;
}
public BaseBlockPosition down() {
@@ -75,13 +73,14 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
public BaseBlockPosition shift(EnumDirection enumdirection, int i) {
return i == 0 ? this : new BaseBlockPosition(this.getX() + enumdirection.getAdjacentX() * i, this.getY() + enumdirection.getAdjacentY() * i, this.getZ() + enumdirection.getAdjacentZ() * i);
}
+ // Paper end
public BaseBlockPosition d(BaseBlockPosition baseblockposition) {
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());
}
public boolean a(BaseBlockPosition baseblockposition, double d0) {
- return this.distanceSquared((double) baseblockposition.getX(), (double) baseblockposition.getY(), (double) baseblockposition.getZ(), false) < d0 * d0;
+ return this.distanceSquared((double) baseblockposition.x, (double) baseblockposition.y, (double) baseblockposition.z, false) < d0 * d0; // Paper
}
public boolean a(IPosition iposition, double d0) {
@@ -106,9 +105,9 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
}
public int n(BaseBlockPosition baseblockposition) {
- float f = (float) Math.abs(baseblockposition.getX() - this.getX());
- float f1 = (float) Math.abs(baseblockposition.getY() - this.getY());
- float f2 = (float) Math.abs(baseblockposition.getZ() - this.getZ());
+ float f = (float) Math.abs(baseblockposition.getX() - this.x); // Paper
+ float f1 = (float) Math.abs(baseblockposition.getY() - this.y); // Paper
+ float f2 = (float) Math.abs(baseblockposition.getZ() - this.z); // Paper
return (int) (f + f1 + f2);
}
diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
index 5dbd3e60fe..e9ea232a78 100644
--- a/src/main/java/net/minecraft/server/BlockPosition.java
+++ b/src/main/java/net/minecraft/server/BlockPosition.java
@@ -342,11 +342,13 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
}
public static class MutableBlockPosition extends BlockPosition {
-
+ // Paper start - comment out
+ /*
protected int b;
protected int c;
protected int d;
-
+ */
+ // Paper end
public MutableBlockPosition() {
this(0, 0, 0);
}
@@ -356,10 +358,13 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
}
public MutableBlockPosition(int i, int j, int k) {
- super(0, 0, 0);
+ // Paper start
+ super(i, j, k);
+ /*
this.b = i;
this.c = j;
- this.d = k;
+ this.d = k;*/
+ // Paper end
}
public MutableBlockPosition(double d0, double d1, double d2) {
@@ -390,6 +395,9 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
return super.a(enumblockrotation).immutableCopy();
}
+
+ /*
+ // Paper start - use parent getters
@Override
public int getX() {
return this.b;
@@ -403,13 +411,16 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
@Override
public int getZ() {
return this.d;
- }
+ }*/
+ // Paper end
public BlockPosition.MutableBlockPosition setValues(int i, int j, int k) { return d(i, j, k);} // Paper - OBFHELPER
public BlockPosition.MutableBlockPosition d(int i, int j, int k) {
- this.b = i;
- this.c = j;
- this.d = k;
+ // Paper start - use xyz
+ this.x = i;
+ this.y = j;
+ this.z = k;
+ // Paper end
return this;
}
@@ -439,26 +450,26 @@ public class BlockPosition extends BaseBlockPosition implements MinecraftSeriali
}
public BlockPosition.MutableBlockPosition c(EnumDirection enumdirection, int i) {
- return this.d(this.b + enumdirection.getAdjacentX() * i, this.c + enumdirection.getAdjacentY() * i, this.d + enumdirection.getAdjacentZ() * i);
+ return this.d(this.x + enumdirection.getAdjacentX() * i, this.y + enumdirection.getAdjacentY() * i, this.z + enumdirection.getAdjacentZ() * i);
}
public BlockPosition.MutableBlockPosition e(int i, int j, int k) {
- return this.d(this.b + i, this.c + j, this.d + k);
+ return this.d(this.x + i, this.y + j, this.z + k);
}
public final void setX(final int x) { this.o(x); } // Paper - OBFHELPER
public void o(int i) {
- this.b = i;
+ this.x = i; // Paper change to x
}
public final void setY(final int y) { this.p(y); } // Paper - OBFHELPER
public void p(int i) {
- this.c = i;
+ this.y = i; // Paper change to y
}
public final void setZ(final int z) { this.q(z); } // Paper - OBFHELPER
public void q(int i) {
- this.d = i;
+ this.z = i; // Paper change to z
}
@Override
--
2.25.1