diff --git a/Spigot-Server-Patches/0166-Delay-Chunk-Unloads-based-on-Player-Movement.patch b/Spigot-Server-Patches/0166-Delay-Chunk-Unloads-based-on-Player-Movement.patch
new file mode 100644
index 000000000..504b11492
--- /dev/null
+++ b/Spigot-Server-Patches/0166-Delay-Chunk-Unloads-based-on-Player-Movement.patch
@@ -0,0 +1,146 @@
+From 68e4453fda0928d5f744d39a343cd16afc82bed2 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sat, 18 Jun 2016 23:22:12 -0400
+Subject: [PATCH] Delay Chunk Unloads based on Player Movement
+
+When players are moving in the world, doing things such as building or exploring,
+they will commonly go back and forth in a small area. This causes a ton of chunk load
+and unload activity on the edge chunks of their view distance.
+
+A simple back and forth movement in 6 blocks could spam a chunk to thrash a
+loading and unload cycle over and over again.
+
+This is very wasteful. This system introduces a delay of inactivity on a chunk
+before it actually unloads, which is maintained separately from ChunkGC.
+
+This allows servers with smaller worlds who do less long distance exploring to stop
+wasting cpu cycles on saving/unloading/reloading chunks repeatedly.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+index 0d2af96..bc41b7e 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+@@ -364,6 +364,15 @@ public class PaperWorldConfig {
+         }
+     }
+ 
++    public long delayChunkUnloadsBy;
++    private void delayChunkUnloadsBy() {
++        delayChunkUnloadsBy = PaperConfig.getSeconds(getString("delay-chunk-unloads-by", "30s"));
++        if (delayChunkUnloadsBy > 0) {
++            log("Delaying chunk unloads by " + delayChunkUnloadsBy + " seconds");
++            delayChunkUnloadsBy *= 1000;
++        }
++    }
++
+     public boolean isHopperPushBased;
+     private void isHopperPushBased() {
+         isHopperPushBased = getBoolean("hopper.push-based", true);
+diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
+index 2429579..e4be7d8 100644
+--- a/src/main/java/net/minecraft/server/Chunk.java
++++ b/src/main/java/net/minecraft/server/Chunk.java
+@@ -31,6 +31,7 @@ public class Chunk {
+     public final World world;
+     public final int[] heightMap;
+     public final long chunkKey; // Paper
++    public Long scheduledForUnload; // Paper - delay chunk unloads
+     public final int locX;
+     public final int locZ;
+     private boolean m;
+diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
+index 33b3db7..21ca3c5 100644
+--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
++++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
+@@ -351,6 +351,19 @@ public class ChunkProviderServer implements IChunkProvider {
+                     }
+                 }
+             }
++            // Paper start - delayed chunk unloads
++            long now = System.currentTimeMillis();
++            long unloadAfter = world.paperConfig.delayChunkUnloadsBy;
++            if (unloadAfter > 0) {
++                //noinspection Convert2streamapi
++                for (Chunk chunk : chunks.values()) {
++                    if (chunk.scheduledForUnload != null && now - chunk.scheduledForUnload > unloadAfter) {
++                        chunk.scheduledForUnload = null;
++                        unload(chunk);
++                    }
++                }
++            }
++            // Paper end
+ 
+             this.chunkLoader.a();
+         }
+diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
+index dd40e98..f109e98 100644
+--- a/src/main/java/net/minecraft/server/PlayerChunk.java
++++ b/src/main/java/net/minecraft/server/PlayerChunk.java
+@@ -32,8 +32,16 @@ public class PlayerChunk {
+         public void run() {
+             loadInProgress = false;
+             PlayerChunk.this.chunk = PlayerChunk.this.playerChunkMap.getWorld().getChunkProviderServer().getOrLoadChunkAt(location.x, location.z);
++            markChunkUsed(); // Paper - delay chunk unloads
+         }
+     };
++    // Paper start - delay chunk unloads
++    public final void markChunkUsed() {
++        if (chunk != null && chunk.scheduledForUnload != null) {
++            chunk.scheduledForUnload = null;
++        }
++    }
++    // Paper end
+     // CraftBukkit end
+ 
+     public PlayerChunk(PlayerChunkMap playerchunkmap, int i, int j) {
+@@ -42,6 +50,7 @@ public class PlayerChunk {
+         // CraftBukkit start
+         loadInProgress = true;
+         this.chunk = playerchunkmap.getWorld().getChunkProviderServer().getChunkAt(i, j, loadedRunnable, false);
++        markChunkUsed(); // Paper - delay chunk unloads
+         // CraftBukkit end
+     }
+ 
+@@ -110,6 +119,7 @@ public class PlayerChunk {
+             if (!loadInProgress) {
+                 loadInProgress = true;
+                 this.chunk = playerChunkMap.getWorld().getChunkProviderServer().getChunkAt(this.location.x, this.location.z, loadedRunnable, flag);
++                markChunkUsed(); // Paper - delay chunk unloads
+             }
+             // CraftBukkit end
+ 
+diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
+index 6320247..9fed846 100644
+--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
++++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
+@@ -458,7 +458,13 @@ public class PlayerChunkMap {
+         Chunk chunk = playerchunk.f();
+ 
+         if (chunk != null) {
+-            this.getWorld().getChunkProviderServer().unload(chunk);
++            // Paper start - delay chunk unloads
++            if (world.paperConfig.delayChunkUnloadsBy <= 0) {
++                this.getWorld().getChunkProviderServer().unload(chunk);
++            } else {
++                chunk.scheduledForUnload = System.currentTimeMillis();
++            }
++            // Paper end
+         }
+ 
+     }
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index 22d142a..8aaf64f 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -1548,7 +1548,7 @@ public class CraftWorld implements World {
+         ChunkProviderServer cps = world.getChunkProviderServer();
+         for (net.minecraft.server.Chunk chunk : cps.chunks.values()) {
+             // If in use, skip it
+-            if (isChunkInUse(chunk.locX, chunk.locZ)) {
++            if (isChunkInUse(chunk.locX, chunk.locZ) || chunk.scheduledForUnload != null) { // Paper - delayed chunk unloads
+                 continue;
+             }
+ 
+-- 
+2.9.0
+