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 3b3684d202e460a80b3e6e97afbaa4c84c4e3b3b..39b187dc90f79dbfff55be697b8cb4d404b290fc 100644 --- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java +++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java @@ -441,6 +441,7 @@ public class ServerChunkCache extends ChunkSource implements ca.spottedleaf.moon // Paper - chunk tick iteration optimisations + this.level.resetIceAndSnowTick(); // Gale - Airplane - optimize random calls in chunk ticking - reset ice & snow tick random if (this.level.tickRateManager().runsNormally()) { this.level.timings.countNaturalMobs.startTiming(); // Paper - timings int k = this.distanceManager.getNaturalSpawnChunkCount(); diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java index 7aa13de4b3778e6708ed46ddcedde100f585a40f..bad5725292cf549d2cd4f62bc3c77c321df24294 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -834,13 +834,15 @@ public class ServerLevel extends Level implements WorldGenLevel, ca.spottedleaf. } // Paper end - optimise random ticking + private int currentIceAndSnowTick = 0; protected void resetIceAndSnowTick() { this.currentIceAndSnowTick = this.random.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(); int j = chunkcoordintpair.getMinBlockX(); int k = chunkcoordintpair.getMinBlockZ(); - if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && this.random.nextInt(this.spigotConfig.thunderChance) == 0) { // Spigot // Paper - Option to 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 - Option to disable thunder // Gale - Airplane - optimize random calls in chunk ticking - replace random with shouldDoLightning BlockPos blockposition = this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15)); if (this.isRainingAt(blockposition)) { @@ -868,7 +870,7 @@ public class ServerLevel extends Level implements WorldGenLevel, ca.spottedleaf. } } - if (!this.paperConfig().environment.disableIceAndSnow) { // Paper - Option to disable ice and snow + if (!this.paperConfig().environment.disableIceAndSnow && (this.currentIceAndSnowTick++ & 15) == 0) { // Paper - Option to disable ice and snow // Gale - Airplane - optimize random calls in chunk ticking - optimize further random ticking for (int l = 0; l < randomTickSpeed; ++l) { if (this.random.nextInt(48) == 0) { this.tickPrecipitation(this.getBlockRandomPos(j, 0, k, 15)); 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 36540053590c30a902b9986dcf2e74375157822d..f23ed06a943646f45e1291f35ab3025e1dfa6b49 100644 --- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java @@ -85,6 +85,18 @@ public class LevelChunk extends ChunkAccess implements ca.spottedleaf.moonrise.p 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); } @@ -116,6 +128,8 @@ public class LevelChunk extends ChunkAccess implements ca.spottedleaf.moonrise.p this.debug = !empty && this.level.isDebug(); this.defaultBlockState = empty ? VOID_AIR_BLOCKSTATE : AIR_BLOCKSTATE; // Paper end - get block chunk optimisation + + this.lightningTick = new java.util.Random().nextInt(100000) << 1; // Gale - Airplane - optimize random calls in chunk ticking - initialize lightning tick } // CraftBukkit start