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Code Issues Releases Activity

Use platform math functions

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This commit is contained in:
Martijn Muijsers
2023-08-08 20:49:05 +02:00
parent de70588630
commit 562d6e3dd1
123 changed files with 205 additions and 18 deletions
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patches/server/0046-Optimize-entity-coordinate-key.patch Normal file
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 23 Nov 2022 23:32:51 +0100
Subject: [PATCH] Optimize entity coordinate key
License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org
This patch is based on the following patch:
"Optimize entity coordinate key"
By: Kevin Raneri <kevin.raneri@gmail.com>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
* Pufferfish description *
When executing getCoordinateKey for entities (a hotpath), the JVM is
required to repeatedly cast doubles to longs. The performance impact of
this depends on the CPU architecture, but generally switching between
FPU and ALU incurs a significant performance hit. The casted/rounded
data is already available in the blockPosition struct, so we use that
instead of re-doing the casting.
diff --git a/src/main/java/io/papermc/paper/util/MCUtil.java b/src/main/java/io/papermc/paper/util/MCUtil.java
index 517ea24ed254eaa9c13439b8b83e8391ea5e10ff..7b3713c8c0840190292a96b7e8b9be620c83274d 100644
--- a/src/main/java/io/papermc/paper/util/MCUtil.java
+++ b/src/main/java/io/papermc/paper/util/MCUtil.java
@@ -209,7 +209,7 @@ public final class MCUtil {
}
public static long getCoordinateKey(final Entity entity) {
- return ((long)(MCUtil.fastFloor(entity.getZ()) >> 4) << 32) | ((MCUtil.fastFloor(entity.getX()) >> 4) & 0xFFFFFFFFL);
+ return ((long)(entity.blockPosition.getZ() >> 4) << 32) | ((entity.blockPosition.getX() >> 4) & 0xFFFFFFFFL); // Gale - Pufferfish - optimize entity coordinate key - eliminate double->long cast in hotpath
}
public static long getCoordinateKey(final ChunkPos pair) {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 6754e0636e5b11f431717e9e77310ac00f8b33b4..1e43237008827538773d3299778d6778bee4049b 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -306,7 +306,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
public double yo;
public double zo;
private Vec3 position;
- private BlockPos blockPosition;
+ public BlockPos blockPosition; // Gale - Pufferfish - optimize entity coordinate key - private -> public
private ChunkPos chunkPosition;
private Vec3 deltaMovement;
private float yRot;