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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.
53 lines
2.1 KiB
Diff
53 lines
2.1 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, 10 Jun 2021 14:36:00 -0700
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Subject: [PATCH] Optimise BlockSoil nearby water lookup
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Apparently the abstract block iteration was taking about
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75% of the method call.
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diff --git a/src/main/java/net/minecraft/world/level/block/FarmBlock.java b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
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index 529f9f57249bd1ffa2698da76ffa9d4a284088db..d59e33e7326489c6d55d316d0130f22235f4c63c 100644
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--- a/src/main/java/net/minecraft/world/level/block/FarmBlock.java
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+++ b/src/main/java/net/minecraft/world/level/block/FarmBlock.java
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@@ -152,19 +152,28 @@ public class FarmBlock extends Block {
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}
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private static boolean isNearWater(LevelReader world, BlockPos pos) {
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- Iterator iterator = BlockPos.betweenClosed(pos.offset(-4, 0, -4), pos.offset(4, 1, 4)).iterator();
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-
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- BlockPos blockposition1;
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-
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- do {
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- if (!iterator.hasNext()) {
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- return false;
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+ // Paper start - Perf: remove abstract block iteration
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+ int xOff = pos.getX();
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+ int yOff = pos.getY();
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+ int zOff = pos.getZ();
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+
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+ for (int dz = -4; dz <= 4; ++dz) {
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+ int z = dz + zOff;
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+ for (int dx = -4; dx <= 4; ++dx) {
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+ int x = xOff + dx;
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+ for (int dy = 0; dy <= 1; ++dy) {
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+ int y = dy + yOff;
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+ net.minecraft.world.level.chunk.LevelChunk chunk = (net.minecraft.world.level.chunk.LevelChunk)world.getChunk(x >> 4, z >> 4);
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+ net.minecraft.world.level.material.FluidState fluid = chunk.getBlockStateFinal(x, y, z).getFluidState();
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+ if (fluid.is(FluidTags.WATER)) {
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+ return true;
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+ }
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+ }
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}
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+ }
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- blockposition1 = (BlockPos) iterator.next();
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- } while (!world.getFluidState(blockposition1).is(FluidTags.WATER));
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-
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- return true;
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+ return false;
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+ // Paper end - Perf: remove abstract block iteration
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}
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@Override
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