Don't save Proto Chunks

These chunks are unfinished, and waste cpu time saving these unfinished chunks.
the loadChunk method refuses to acknoledge they exists, and will restart
a new chunk generation process to begin with, so saving them serves no benefit.

Spigot-Server-Patches/0307-Don-t-save-Proto-Chunks.patch

@@ -0,0 +1,46 @@
+From 5fcdb15e3e736e338a24f294f5f59e8a255d9080 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 22 Jul 2018 21:21:41 -0400
+Subject: [PATCH] Don't save Proto Chunks
+
+These chunks are unfinished, and waste cpu time saving these unfinished chunks.
+the loadChunk method refuses to acknoledge they exists, and will restart
+a new chunk generation process to begin with, so saving them serves no benefit.
+
+diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
+index fd8430a68..b425704b1 100644
+--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
++++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
+@@ -250,7 +250,7 @@ public class ChunkProviderServer implements IChunkProvider {
+     public boolean a(boolean flag) {
+         int i = 0;
+ 
+-        this.f.a();
++        //this.f.a(); // Paper - don't save proto chunks
+         ArrayList arraylist = Lists.newArrayList(this.chunks.values());
+         Iterator iterator = arraylist.iterator();
+ 
+@@ -369,7 +369,7 @@ public class ChunkProviderServer implements IChunkProvider {
+             }
+             // Paper end
+ 
+-            this.f.a();
++            //this.f.a(); // Paper - don't save proto chunks
+             this.chunkLoader.b();
+         }
+ 
+diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+index ea8684747..7acb3744d 100644
+--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
++++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+@@ -282,6 +282,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
+     }
+ 
+     public synchronized void saveChunk(World world, IChunkAccess ichunkaccess, boolean unloaded) throws IOException, ExceptionWorldConflict {
++        if (ichunkaccess.i().d() == ChunkStatus.Type.PROTOCHUNK) { new Throwable().printStackTrace(); return; } // Paper - don't save proto chunks
+         // Spigot end
+         world.checkSession();
+ 
+-- 
+2.18.0
+