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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.
71 lines
3.7 KiB
Diff
71 lines
3.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: miclebrick <miclebrick@outlook.com>
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Date: Thu, 6 Dec 2018 19:52:50 -0500
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Subject: [PATCH] Cache block data strings
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index dd5f74fe4c8ca81b1d1102805ea8acb9087ba91e..d2866b9f7e6c8f0ca30d451c93c56caefb2c1b5c 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -2145,6 +2145,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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this.getPlayerList().reloadResources();
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this.functionManager.replaceLibrary(this.resources.managers.getFunctionLibrary());
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this.structureTemplateManager.onResourceManagerReload(this.resources.resourceManager);
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+ org.bukkit.craftbukkit.block.data.CraftBlockData.reloadCache(); // Paper - cache block data strings; they can be defined by datapacks so refresh it here
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}, this);
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if (this.isSameThread()) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
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index c1c5750dd2e4a9af1a115996a87eaaa1ea552c74..67ff2241aa8869b41abb0a93467b8694618264e2 100644
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--- a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
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+++ b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
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@@ -154,7 +154,7 @@ public class CraftBlockData implements BlockData {
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return exactMatch;
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}
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- private static final Map<Class<? extends Enum<?>>, Enum<?>[]> ENUM_VALUES = new HashMap<>();
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+ private static final Map<Class<? extends Enum<?>>, Enum<?>[]> ENUM_VALUES = new java.util.concurrent.ConcurrentHashMap<>(); // Paper - cache block data strings; make thread safe
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/**
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* Convert an NMS Enum (usually a BlockStateEnum) to its appropriate Bukkit
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@@ -539,7 +539,38 @@ public class CraftBlockData implements BlockData {
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Preconditions.checkState(CraftBlockData.MAP.put(nms, bukkit) == null, "Duplicate mapping %s->%s", nms, bukkit);
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}
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+ // Paper start - cache block data strings
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+ private static Map<String, CraftBlockData> stringDataCache = new java.util.concurrent.ConcurrentHashMap<>();
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+
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+ static {
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+ // cache all of the default states at startup, will not cache ones with the custom states inside of the
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+ // brackets in a different order, though
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+ reloadCache();
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+ }
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+
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+ public static void reloadCache() {
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+ stringDataCache.clear();
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+ Block.BLOCK_STATE_REGISTRY.forEach(blockData -> stringDataCache.put(blockData.toString(), blockData.createCraftBlockData()));
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+ }
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+ // Paper end - cache block data strings
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+
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public static CraftBlockData newData(BlockType blockType, String data) {
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+
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+ // Paper start - cache block data strings
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+ if (blockType != null) {
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+ Block block = CraftBlockType.bukkitToMinecraftNew(blockType);
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+ if (block != null) {
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+ net.minecraft.resources.ResourceLocation key = BuiltInRegistries.BLOCK.getKey(block);
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+ data = data == null ? key.toString() : key + data;
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+ }
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+ }
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+
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+ CraftBlockData cached = stringDataCache.computeIfAbsent(data, s -> createNewData(null, s));
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+ return (CraftBlockData) cached.clone();
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+ }
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+
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+ private static CraftBlockData createNewData(BlockType blockType, String data) {
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+ // Paper end - cache block data strings
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net.minecraft.world.level.block.state.BlockState blockData;
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Block block = blockType == null ? null : ((CraftBlockType<?>) blockType).getHandle();
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Map<Property<?>, Comparable<?>> parsed = null;
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