Paper/Spigot-Server-Patches/0298-Speedup-BlockPos-by-fixing-inlining.patch

207 lines
8.5 KiB
Diff
Raw Normal View History

From 0f133791272ef61f2012e980808baf094cc01bb4 Mon Sep 17 00:00:00 2001
2016-12-01 03:57:02 +01:00
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 680764b342..25334377a2 100644
2016-12-01 03:57:02 +01:00
--- a/src/main/java/net/minecraft/server/BaseBlockPosition.java
+++ b/src/main/java/net/minecraft/server/BaseBlockPosition.java
@@ -6,22 +6,22 @@ import javax.annotation.concurrent.Immutable;
@Immutable
2016-12-01 03:57:02 +01:00
public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
public static final BaseBlockPosition ZERO = new BaseBlockPosition(0, 0, 0);
- private final int a;
- private final int b;
- 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;
2016-12-01 03:57:02 +01:00
}
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) {
@@ -57,17 +57,19 @@ public class BaseBlockPosition implements Comparable<BaseBlockPosition> {
}
2016-12-01 03:57:02 +01:00
}
- public int getX() {
- return this.a;
+ // Paper start
2016-12-01 03:57:02 +01:00
+ public final int getX() {
+ return this.x;
2016-12-01 03:57:02 +01:00
}
public int getY() {
- return this.b;
+ return this.y;
2016-12-01 03:57:02 +01:00
}
public int getZ() {
- return this.c;
+ return this.z;
2016-12-01 03:57:02 +01:00
}
+ // Paper end
public BaseBlockPosition d(BaseBlockPosition baseblockposition1) {
return new BaseBlockPosition(this.getY() * baseblockposition1.getZ() - this.getZ() * baseblockposition1.getY(), this.getZ() * baseblockposition1.getX() - this.getX() * baseblockposition1.getZ(), this.getX() * baseblockposition1.getY() - this.getY() * baseblockposition1.getX());
2016-12-01 03:57:02 +01:00
diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
index 7bd51b3578..9ce3cd9c9d 100644
2016-12-01 03:57:02 +01:00
--- a/src/main/java/net/minecraft/server/BlockPosition.java
+++ b/src/main/java/net/minecraft/server/BlockPosition.java
@@ -205,18 +205,20 @@ public class BlockPosition extends BaseBlockPosition {
if (this.g == null) {
this.g = new BlockPosition.MutableBlockPosition(ix, jx, kx);
return this.g;
- } else if (this.g.b == l && this.g.c == i1 && this.g.d == j1) {
+ } else if (this.g.x == l && this.g.y == i1 && this.g.z == j1) { // Paper - use x/y/z
return (BlockPosition.MutableBlockPosition)this.endOfData();
} else {
- if (this.g.b < l) {
- ++this.g.b;
- } else if (this.g.c < i1) {
- this.g.b = ix; // Paper - decompile fix Readd line removed by the decompiler
- ++this.g.c;
- } else if (this.g.d < j1) {
- this.g.b = ix; // Paper - decompile fix Readd line removed by the decompiler
- this.g.c = jx; // Paper - decompile fix Readd line removed by the decompiler
- ++this.g.d;
+ // Paper start - use xyz
+ if (this.g.x < l) {
+ ++this.g.x;
+ } else if (this.g.y < i1) {
+ this.g.x = ix; // Paper - decompile fix Readd line removed by the decompiler
+ ++this.g.y;
+ } else if (this.g.z < j1) {
+ this.g.x = ix; // Paper - decompile fix Readd line removed by the decompiler
+ this.g.y = jx; // Paper - decompile fix Readd line removed by the decompiler
+ ++this.g.z;
2016-12-20 23:34:27 +01:00
+ // Paper end
2016-12-01 03:57:02 +01:00
}
return this.g;
@@ -237,10 +239,12 @@ public class BlockPosition extends BaseBlockPosition {
}
2016-12-01 03:57:02 +01:00
public static class MutableBlockPosition extends BlockPosition {
+ // Paper start - comment out
2016-12-01 03:57:02 +01:00
+ /*
protected int b;
protected int c;
protected int d;
- // Paper start
+
@Override
public boolean isValidLocation() {
return b >= -30000000 && d >= -30000000 && b < 30000000 && d < 30000000 && c >= 0 && c < 256;
@@ -249,6 +253,7 @@ public class BlockPosition extends BaseBlockPosition {
2016-12-01 03:57:02 +01:00
public boolean isInvalidYLocation() {
return c < 0 || c >= 256;
}
+ */
// Paper end
public MutableBlockPosition() {
@@ -260,10 +265,13 @@ public class BlockPosition extends BaseBlockPosition {
}
2016-12-01 03:57:02 +01:00
public MutableBlockPosition(int i, int j, int k) {
- super(0, 0, 0);
+ // Paper start
+ super(i, j, k);
+ /*
this.b = i;
this.c = j;
2016-12-01 03:57:02 +01:00
- this.d = k;
+ this.d = k;*/
2016-12-01 03:57:02 +01:00
+ // Paper end
}
public BlockPosition a(double d0, double d1, double d2) {
@@ -282,6 +290,8 @@ public class BlockPosition extends BaseBlockPosition {
2016-12-01 03:57:02 +01:00
return super.a(enumblockrotation).h();
}
+ /*
+ // Paper start - use parent getters
2016-12-01 03:57:02 +01:00
public int getX() {
return this.b;
}
@@ -292,13 +302,16 @@ public class BlockPosition extends BaseBlockPosition {
2016-12-01 03:57:02 +01:00
public int getZ() {
return this.d;
- }
+ }*/
2016-12-01 03:57:02 +01:00
+ // Paper end
public BlockPosition.MutableBlockPosition setValues(int i, int j, int k) { return c(i, j, k);} // Paper - OBFHELPER
2016-12-01 03:57:02 +01:00
public BlockPosition.MutableBlockPosition c(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;
2016-12-01 03:57:02 +01:00
+ // Paper end
return this;
}
@@ -316,15 +329,15 @@ public class BlockPosition extends BaseBlockPosition {
2016-12-01 03:57:02 +01:00
}
public BlockPosition.MutableBlockPosition c(EnumDirection enumdirection, int i) {
- return this.c(this.b + enumdirection.getAdjacentX() * i, this.c + enumdirection.getAdjacentY() * i, this.d + enumdirection.getAdjacentZ() * i);
+ return this.c(x + enumdirection.getAdjacentX() * i, y + enumdirection.getAdjacentY() * i, z + enumdirection.getAdjacentZ() * i); // Paper - use xyz
}
public BlockPosition.MutableBlockPosition d(int i, int j, int k) {
- return this.c(this.b + i, this.c + j, this.d + k);
+ return this.c(x + i, y + j, z + k); // Paper - use xyz
2016-12-01 03:57:02 +01:00
}
public void p(int i) {
- this.c = i;
+ this.y = i; // Paper change to y
2016-12-01 03:57:02 +01:00
}
public BlockPosition toBlockPosition() { return h(); } // Paper - OBFHELPER
2016-12-01 03:57:02 +01:00
--
2.19.0
2016-12-01 03:57:02 +01:00