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128 lines
7.8 KiB
Diff
128 lines
7.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martijn Muijsers <martijnmuijsers@live.nl>
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Date: Wed, 23 Nov 2022 16:45:45 +0100
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Subject: [PATCH] Optimize random calls in chunk ticking
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License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
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Gale - https://galemc.org
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This patch is based on the following patch:
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"Optimize random calls in chunk ticking"
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By: Paul Sauve <paul@technove.co>
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As part of: Airplane (https://github.com/TECHNOVE/Airplane)
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Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
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The patch also received the following subsequent modification:
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By: Kevin Raneri <kevin.raneri@gmail.com>
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As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
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Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
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* Airplane description *
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Especially at over 30,000 chunks these random calls are fairly heavy. We
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use a different method here for checking lightning, and for checking
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ice.
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Lightning: Each chunk now keeps an int of how many ticks until the
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lightning should strike. This int is a random number from 0 to 100000 * 2,
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the multiplication is required to keep the probability the same.
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Ice and snow: We just generate a single random number 0-16 and increment
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it, while checking if it's 0 for the current chunk.
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Depending on configuration for things that tick in a chunk, this is a
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5-10% improvement.
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* Airplane copyright *
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Airplane
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Copyright (C) 2020 Technove LLC
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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index 78201998d6cbee9aa6f0bad80b726b46675393dc..041f188b742ad819e2460e8ca5ab7f44412dbf9b 100644
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--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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@@ -539,6 +539,7 @@ public class ServerChunkCache extends ChunkSource {
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// Paper end - optimize isOutisdeRange
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LevelData worlddata = this.level.getLevelData();
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+ this.level.resetIceAndSnowTick(); // Gale - Airplane - optimize random calls in chunk ticking - reset ice & snow tick random
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int k = this.level.getGameRules().getInt(GameRules.RULE_RANDOMTICKING);
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boolean flag1 = level.ticksPerSpawnCategory.getLong(org.bukkit.entity.SpawnCategory.ANIMAL) != 0L && worlddata.getGameTime() % level.ticksPerSpawnCategory.getLong(org.bukkit.entity.SpawnCategory.ANIMAL) == 0L; // CraftBukkit
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diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
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index 47acb63bfca2f722a595cf6614c28e75d1d94235..b7318670e039e05a058e437e025519d40557bb88 100644
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--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
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+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
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@@ -913,6 +913,8 @@ public class ServerLevel extends Level implements WorldGenLevel {
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private final BlockPos.MutableBlockPos chunkTickMutablePosition = new BlockPos.MutableBlockPos();
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// Paper end
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+ private int currentIceAndSnowTick = 0; protected void resetIceAndSnowTick() { this.currentIceAndSnowTick = this.randomTickRandom.nextInt(16); } // Gale - Airplane - optimize random calls in chunk ticking
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+
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public void tickChunk(LevelChunk chunk, int randomTickSpeed) {
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ChunkPos chunkcoordintpair = chunk.getPos();
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boolean flag = this.isRaining();
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@@ -920,7 +922,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
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int k = chunkcoordintpair.getMinBlockZ();
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final BlockPos.MutableBlockPos blockposition = this.chunkTickMutablePosition; // Paper - use mutable to reduce allocation rate, final to force compile fail on change
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- if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && this.random.nextInt(this.spigotConfig.thunderChance) == 0) { // Spigot // Paper - disable thunder
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+ if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && /*this.random.nextInt(this.spigotConfig.thunderChance) == 0 &&*/ chunk.shouldDoLightning(this.random)) { // Spigot // Paper - disable thunder // Gale - Airplane - optimize random calls in chunk ticking - replace random with shouldDoLightning
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blockposition.set(this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15))); // Paper
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if (this.isRainingAt(blockposition)) {
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DifficultyInstance difficultydamagescaler = this.getCurrentDifficultyAt(blockposition);
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@@ -950,7 +952,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
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int l;
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int i1;
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- if (!this.paperConfig().environment.disableIceAndSnow && this.random.nextInt(16) == 0) { // Paper - Disable ice and snow
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+ if (!this.paperConfig().environment.disableIceAndSnow && (this.currentIceAndSnowTick++ & 15) == 0) { // Paper - Disable ice and snow // Paper - optimise random ticking // Gale - Airplane - optimize random calls in chunk ticking - optimize further random ticking
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// Paper start - optimise chunk ticking
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this.getRandomBlockPosition(j, 0, k, 15, blockposition);
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int normalY = chunk.getHeight(Heightmap.Types.MOTION_BLOCKING, blockposition.getX() & 15, blockposition.getZ() & 15) + 1;
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diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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index 624c96b0907dfb8b6c351710bed58df78690a483..901938201c1abee1c88e217d2c1ba1a2d147420e 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
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@@ -84,6 +84,18 @@ public class LevelChunk extends ChunkAccess {
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private final LevelChunkTicks<Block> blockTicks;
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private final LevelChunkTicks<Fluid> fluidTicks;
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+ // Gale start - Airplane - optimize random calls in chunk ticking - instead of using a random every time the chunk is ticked, define when lightning strikes preemptively
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+ private int lightningTick;
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+ // shouldDoLightning compiles down to 29 bytes, which with the default of 35 byte inlining should guarantee an inline
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+ public final boolean shouldDoLightning(net.minecraft.util.RandomSource random) {
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+ if (this.lightningTick-- <= 0) {
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+ this.lightningTick = random.nextInt(this.level.spigotConfig.thunderChance) << 1;
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+ return true;
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+ }
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+ return false;
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+ }
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+ // Gale end - Airplane - optimize random calls in chunk ticking - instead of using a random every time the chunk is ticked, define when lightning strikes preemptively
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+
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public LevelChunk(Level world, ChunkPos pos) {
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this(world, pos, UpgradeData.EMPTY, new LevelChunkTicks<>(), new LevelChunkTicks<>(), 0L, (LevelChunkSection[]) null, (LevelChunk.PostLoadProcessor) null, (BlendingData) null);
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}
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@@ -111,6 +123,7 @@ public class LevelChunk extends ChunkAccess {
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this.postLoad = entityLoader;
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this.blockTicks = blockTickScheduler;
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this.fluidTicks = fluidTickScheduler;
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+ this.lightningTick = this.level.randomTickRandom.nextInt(100000) << 1; // Gale - Airplane - optimize random calls in chunk ticking - initialize lightning tick
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}
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// CraftBukkit start
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