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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.
35 lines
2 KiB
Diff
35 lines
2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
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Date: Sat, 31 Oct 2020 11:49:01 -0700
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Subject: [PATCH] Fix client lag on advancement loading
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When new advancements are added via the UnsafeValues#loadAdvancement
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API, it triggers a full datapack reload when this is not necessary. The
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advancement is already loaded directly into the advancement registry,
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and the point of saving the advancement to the Bukkit datapack seems to
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be for persistence. By removing the call to reload datapacks when an
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advancement is loaded, the client no longer completely freezes up when
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adding a new advancement.
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To ensure the client still receives the updated advancement data, we
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manually reload the advancement data for all players, which
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normally takes place as a part of the datapack reloading.
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diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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index a557b40e1807933cf510ea489ebcab4a19c066c1..481aeb922952578ea68ce2425c84e1a93eff0cf9 100644
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--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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@@ -317,7 +317,13 @@ public final class CraftMagicNumbers implements UnsafeValues {
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Bukkit.getLogger().log(Level.SEVERE, "Error saving advancement " + key, ex);
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}
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- MinecraftServer.getServer().getPlayerList().reloadResources();
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+ // Paper start - Fix client lag on advancement loading
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+ //MinecraftServer.getServer().getPlayerList().reload();
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+ MinecraftServer.getServer().getPlayerList().getPlayers().forEach(player -> {
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+ player.getAdvancements().reload(MinecraftServer.getServer().getAdvancements());
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+ player.getAdvancements().flushDirty(player);
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+ });
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+ // Paper end - Fix client lag on advancement loading
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return bukkit;
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}
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