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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.
37 lines
1.9 KiB
Diff
37 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Thu, 6 Jul 2023 20:17:37 -0700
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Subject: [PATCH] Optimize player lookups for beacons
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For larger ranges, it's better to iterate over the player list
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than the entity slices.
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diff --git a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
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index b6633ca1ee73ef0f8a220992a2e0424e67dd9758..814e70f558d7a6186233da0ff86c94c95d390e09 100644
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--- a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
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+++ b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
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@@ -333,7 +333,22 @@ public class BeaconBlockEntity extends BlockEntity implements MenuProvider, Name
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double d0 = blockEntity != null ? blockEntity.getEffectRange() : (i * 10 + 10); // Paper - Custom beacon ranges
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AABB axisalignedbb = (new AABB(blockposition)).inflate(d0).expandTowards(0.0D, (double) world.getHeight(), 0.0D);
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- List<Player> list = world.getEntitiesOfClass(Player.class, axisalignedbb);
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+ // Paper start - Perf: optimize player lookup for beacons
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+ List<Player> list;
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+ if (d0 <= 128.0) {
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+ list = world.getEntitiesOfClass(Player.class, axisalignedbb);
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+ } else {
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+ list = new java.util.ArrayList<>();
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+ for (Player player : world.players()) {
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+ if (player.isSpectator()) {
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+ continue;
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+ }
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+ if (player.getBoundingBox().intersects(axisalignedbb)) {
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+ list.add(player);
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+ }
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+ }
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+ }
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+ // Paper end - Perf: optimize player lookup for beacons
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return list;
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}
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