From c4c018236d1050729389fe9a766654280d9508a0 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/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index bcf59beed6..15bd3cacb3 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -615,27 +615,37 @@ public class ChunkProviderServer extends IChunkProvider {
 
     public final boolean isInEntityTickingChunk(Entity entity) { return this.a(entity); } // Paper - OBFHELPER
     @Override public boolean a(Entity entity) {
-        long i = ChunkCoordIntPair.pair(MathHelper.floor(entity.locX()) >> 4, MathHelper.floor(entity.locZ()) >> 4);
-
-        return this.a(i, PlayerChunk::b);
+        // Paper start - optimize is ticking ready type functions
+        // entity ticking
+        PlayerChunk playerChunk = this.getChunk(MCUtil.getCoordinateKey(entity));
+        return playerChunk != null && playerChunk.isEntityTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     public final boolean isEntityTickingChunk(ChunkCoordIntPair chunkcoordintpair) { return this.a(chunkcoordintpair); } // Paper - OBFHELPER
     @Override public boolean a(ChunkCoordIntPair chunkcoordintpair) {
-        return this.a(chunkcoordintpair.pair(), PlayerChunk::b);
+        // Paper start - optimize is ticking ready type functions
+        // is entity ticking ready
+        PlayerChunk playerChunk = this.getChunk(MCUtil.getCoordinateKey(chunkcoordintpair));
+        return playerChunk != null && playerChunk.isEntityTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     @Override
     public boolean a(BlockPosition blockposition) {
-        long i = ChunkCoordIntPair.pair(blockposition.getX() >> 4, blockposition.getZ() >> 4);
-
-        return this.a(i, PlayerChunk::a);
+        // Paper start - optimize is ticking ready type functions
+        // is ticking ready
+        PlayerChunk playerChunk = this.getChunk(MCUtil.getCoordinateKey(blockposition));
+        return playerChunk != null && playerChunk.isTickingReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     public boolean b(Entity entity) {
-        long i = ChunkCoordIntPair.pair(MathHelper.floor(entity.locX()) >> 4, MathHelper.floor(entity.locZ()) >> 4);
-
-        return this.a(i, PlayerChunk::c);
+        // Paper start - optimize is ticking ready type functions
+        // is full chunk ready
+        PlayerChunk playerChunk = this.getChunk(MCUtil.getCoordinateKey(entity));
+        return playerChunk != null && playerChunk.isFullChunkReady();
+        // Paper end - optimize is ticking ready type functions
     }
 
     private boolean a(long i, Function<PlayerChunk, CompletableFuture<Either<Chunk, PlayerChunk.Failure>>> function) {
-- 
2.25.1