From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Thu, 16 Apr 2020 16:13:59 -0700
Subject: [PATCH] Optimize ChunkProviderServer's chunk level checking helper
 methods

These can be hot functions (i.e entity ticking and block ticking),
so inline where possible, and avoid the abstraction of the
Either class.

diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -0,0 +0,0 @@ import net.minecraft.network.protocol.Packet;
 import net.minecraft.server.MCUtil;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.progress.ChunkProgressListener;
-import net.minecraft.util.Mth;
 import net.minecraft.util.profiling.ProfilerFiller;
 import net.minecraft.util.thread.BlockableEventLoop;
 import net.minecraft.world.entity.Entity;
@@ -0,0 +0,0 @@ public class ServerChunkCache extends ChunkSource {
 
     public final boolean isInEntityTickingChunk(Entity entity) { return this.isEntityTickingChunk(entity); } // Paper - OBFHELPER
     @Override public boolean isEntityTickingChunk(Entity entity) {
-        long i = ChunkPos.asLong(Mth.floor(entity.getX()) >> 4, Mth.floor(entity.getZ()) >> 4);
-
-        return this.checkChunkFuture(i, (Function<ChunkHolder, CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>>>) ChunkHolder::getEntityTickingChunkFuture); // CraftBukkit - decompile error
+        // Paper start - optimize is ticking ready type functions
+        // entity ticking
+        ChunkHolder playerChunk = this.getVisibleChunkIfPresent(MCUtil.getCoordinateKey(entity));
+        return playerChunk != null && playerChunk.isEntityTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     public final boolean isEntityTickingChunk(ChunkPos chunkcoordintpair) { return this.isEntityTickingChunk(chunkcoordintpair); } // Paper - OBFHELPER
     @Override public boolean isEntityTickingChunk(ChunkPos pos) {
-        return this.checkChunkFuture(pos.toLong(), (Function<ChunkHolder, CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>>>) ChunkHolder::getEntityTickingChunkFuture); // CraftBukkit - decompile error
+        // Paper start - optimize is ticking ready type functions
+        // is entity ticking ready
+        ChunkHolder playerChunk = this.getVisibleChunkIfPresent(MCUtil.getCoordinateKey(pos));
+        return playerChunk != null && playerChunk.isEntityTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     @Override
     public boolean isTickingChunk(BlockPos pos) {
-        long i = ChunkPos.asLong(pos.getX() >> 4, pos.getZ() >> 4);
-
-        return this.checkChunkFuture(i, (Function<ChunkHolder, CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>>>) ChunkHolder::getTickingChunkFuture); // CraftBukkit - decompile error
+        // Paper start - optimize is ticking ready type functions
+        // is ticking ready
+        ChunkHolder playerChunk = this.getVisibleChunkIfPresent(MCUtil.getCoordinateKey(pos));
+        return playerChunk != null && playerChunk.isTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     private boolean checkChunkFuture(long pos, Function<ChunkHolder, CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>>> futureFunction) {