mirror of
https://github.com/PaperMC/Paper.git
synced 2024-12-28 15:30:19 +01:00
c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
59 lines
3.8 KiB
Diff
59 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
|
|
Date: Mon, 27 Apr 2020 00:04:16 -0700
|
|
Subject: [PATCH] Reduce allocation of Vec3D by entity tracker
|
|
|
|
|
|
diff --git a/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java b/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
|
|
index a043ac10834562d357ef0b5aded2e916e2a0d056..74276c368016fcc4dbf9579b2ecbadc9614baf15 100644
|
|
--- a/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
|
|
+++ b/src/main/java/net/minecraft/network/protocol/game/VecDeltaCodec.java
|
|
@@ -5,7 +5,7 @@ import org.jetbrains.annotations.VisibleForTesting;
|
|
|
|
public class VecDeltaCodec {
|
|
private static final double TRUNCATION_STEPS = 4096.0;
|
|
- private Vec3 base = Vec3.ZERO;
|
|
+ public Vec3 base = Vec3.ZERO; // Paper
|
|
|
|
@VisibleForTesting
|
|
static long encode(double value) {
|
|
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
index 6c667823c2ef15766f3afc1a9c819cb6c24b0912..4c1cf5798209297e1e8a634b63770e917a84a63c 100644
|
|
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
|
|
@@ -1519,10 +1519,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
|
|
public void updatePlayer(ServerPlayer player) {
|
|
org.spigotmc.AsyncCatcher.catchOp("player tracker update"); // Spigot
|
|
if (player != this.entity) {
|
|
- Vec3 vec3d = player.position().subtract(this.entity.position());
|
|
+ // Paper start - remove allocation of Vec3D here
|
|
+ // Vec3 vec3d = player.position().subtract(this.entity.position());
|
|
+ double vec3d_dx = player.getX() - this.entity.getX();
|
|
+ double vec3d_dz = player.getZ() - this.entity.getZ();
|
|
+ // Paper end - remove allocation of Vec3D here
|
|
int i = ChunkMap.this.getPlayerViewDistance(player);
|
|
double d0 = (double) Math.min(this.getEffectiveRange(), i * 16);
|
|
- double d1 = vec3d.x * vec3d.x + vec3d.z * vec3d.z;
|
|
+ double d1 = vec3d_dx * vec3d_dx + vec3d_dz * vec3d_dz; // Paper
|
|
double d2 = d0 * d0;
|
|
// Paper start - Configurable entity tracking range by Y
|
|
boolean flag = d1 <= d2;
|
|
diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
index a2fbbbd7a66d4e7b1063638f8467e8887a417282..0e7ace92522fbd4cef7b2c2b8a0f8b86c2cce192 100644
|
|
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
|
|
@@ -163,7 +163,13 @@ public class ServerEntity {
|
|
i = Mth.floor(this.entity.getYRot() * 256.0F / 360.0F);
|
|
j = Mth.floor(this.entity.getXRot() * 256.0F / 360.0F);
|
|
Vec3 vec3d = this.entity.trackingPosition();
|
|
- boolean flag1 = this.positionCodec.delta(vec3d).lengthSqr() >= 7.62939453125E-6D;
|
|
+ // Paper start - reduce allocation of Vec3D here
|
|
+ Vec3 base = this.positionCodec.base;
|
|
+ double vec3d_dx = vec3d.x - base.x;
|
|
+ double vec3d_dy = vec3d.y - base.y;
|
|
+ double vec3d_dz = vec3d.z - base.z;
|
|
+ boolean flag1 = (vec3d_dx * vec3d_dx + vec3d_dy * vec3d_dy + vec3d_dz * vec3d_dz) >= 7.62939453125E-6D;
|
|
+ // Paper end - reduce allocation of Vec3D here
|
|
Packet<?> packet1 = null;
|
|
boolean flag2 = flag1 || this.tickCount % 60 == 0;
|
|
boolean flag3 = Math.abs(i - this.lastSentYRot) >= 1 || Math.abs(j - this.lastSentXRot) >= 1;
|