From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Martijn Muijsers Date: Wed, 23 Nov 2022 16:45:45 +0100 Subject: [PATCH] Optimize random calls in chunk ticking 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 random calls in chunk ticking" By: Paul Sauve As part of: Airplane (https://github.com/TECHNOVE/Airplane) Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html) The patch also received the following subsequent modification: By: Kevin Raneri As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish) Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html) * Airplane description * Especially at over 30,000 chunks these random calls are fairly heavy. We use a different method here for checking lightning, and for checking ice. Lightning: Each chunk now keeps an int of how many ticks until the lightning should strike. This int is a random number from 0 to 100000 * 2, the multiplication is required to keep the probability the same. Ice and snow: We just generate a single random number 0-16 and increment it, while checking if it's 0 for the current chunk. Depending on configuration for things that tick in a chunk, this is a 5-10% improvement. * Airplane copyright * Airplane Copyright (C) 2020 Technove LLC This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java index d95c3b14c06421c03c99f84efb3a5319200f8a57..8ed18a158a13dceca7cd342125c09e52ac0d013c 100644 --- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java +++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java @@ -689,6 +689,7 @@ public class ServerChunkCache extends ChunkSource { // Paper end - optimize isOutisdeRange LevelData worlddata = this.level.getLevelData(); + this.level.resetIceAndSnowTick(); // Gale - Airplane - optimize random calls in chunk ticking - reset ice & snow tick random int k = this.level.getGameRules().getInt(GameRules.RULE_RANDOMTICKING); boolean flag1 = level.ticksPerSpawnCategory.getLong(org.bukkit.entity.SpawnCategory.ANIMAL) != 0L && worlddata.getGameTime() % level.ticksPerSpawnCategory.getLong(org.bukkit.entity.SpawnCategory.ANIMAL) == 0L; // CraftBukkit diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java index b8c4a0177b69dc3f79560e7ca5e80e681c73f698..afdc242861a05acfade89e01dfeaad0fa9a13e0a 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -772,6 +772,8 @@ public class ServerLevel extends Level implements WorldGenLevel { private final BlockPos.MutableBlockPos chunkTickMutablePosition = new BlockPos.MutableBlockPos(); // Paper end + private int currentIceAndSnowTick = 0; protected void resetIceAndSnowTick() { this.currentIceAndSnowTick = this.randomTickRandom.nextInt(16); } // Gale - Airplane - optimize random calls in chunk ticking + public void tickChunk(LevelChunk chunk, int randomTickSpeed) { ChunkPos chunkcoordintpair = chunk.getPos(); boolean flag = this.isRaining(); @@ -779,7 +781,7 @@ public class ServerLevel extends Level implements WorldGenLevel { int k = chunkcoordintpair.getMinBlockZ(); final BlockPos.MutableBlockPos blockposition = this.chunkTickMutablePosition; // Paper - use mutable to reduce allocation rate, final to force compile fail on change - if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && this.random.nextInt(this.spigotConfig.thunderChance) == 0) { // Spigot // Paper - disable thunder + 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 blockposition.set(this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15))); // Paper if (this.isRainingAt(blockposition)) { DifficultyInstance difficultydamagescaler = this.getCurrentDifficultyAt(blockposition); @@ -808,7 +810,7 @@ public class ServerLevel extends Level implements WorldGenLevel { int l; - if (!this.paperConfig().environment.disableIceAndSnow && this.random.nextInt(16) == 0) { // Paper - Disable ice and snow + 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 // Paper start - optimise chunk ticking this.getRandomBlockPosition(j, 0, k, 15, blockposition); int normalY = chunk.getHeight(Heightmap.Types.MOTION_BLOCKING, blockposition.getX() & 15, blockposition.getZ() & 15) + 1; diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java index 40e0c951604875ce96b200561cbbf51bab97e188..bca581f2a192015f5461e5bf776234687e5ae9fc 100644 --- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java @@ -87,6 +87,18 @@ public class LevelChunk extends ChunkAccess { private final LevelChunkTicks blockTicks; private final LevelChunkTicks fluidTicks; + // 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 + private int lightningTick; + // shouldDoLightning compiles down to 29 bytes, which with the default of 35 byte inlining should guarantee an inline + public final boolean shouldDoLightning(net.minecraft.util.RandomSource random) { + if (this.lightningTick-- <= 0) { + this.lightningTick = random.nextInt(this.level.spigotConfig.thunderChance) << 1; + return true; + } + return false; + } + // 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 + public LevelChunk(Level world, ChunkPos pos) { this(world, pos, UpgradeData.EMPTY, new LevelChunkTicks<>(), new LevelChunkTicks<>(), 0L, (LevelChunkSection[]) null, (LevelChunk.PostLoadProcessor) null, (BlendingData) null); } @@ -117,6 +129,7 @@ public class LevelChunk extends ChunkAccess { this.fluidTicks = fluidTickScheduler; // CraftBukkit start this.bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this); + this.lightningTick = this.level.randomTickRandom.nextInt(100000) << 1; // Gale - Airplane - optimize random calls in chunk ticking - initialize lightning tick } public org.bukkit.Chunk bukkitChunk;