Added configurable animal and monster ticks per spawn setting.

src/main/java/net/minecraft/server/World.java

@@ -77,6 +77,8 @@ public class World implements IBlockAccess {
     public boolean allowMonsters; // CraftBukkit - private -> public
     public boolean allowAnimals; // CraftBukkit - private -> public
     private LongHashset chunkTickList; // CraftBukkit
+    public long ticksPerAnimalSpawns; // CraftBukkit
+    public long ticksPerMonsterSpawns; // CraftBukkit
     private int U;
     int[] H;
     private List V;
@@ -148,6 +150,8 @@ public class World implements IBlockAccess {
         this.allowMonsters = true;
         this.allowAnimals = true;
         this.chunkTickList = new LongHashset(); // CraftBukkit
+        this.ticksPerAnimalSpawns = this.getServer().getTicksPerAnimalSpawns(); // CraftBukkit
+        this.ticksPerMonsterSpawns = this.getServer().getTicksPerMonsterSpawns(); // CraftBukkit
         this.U = this.random.nextInt(12000);
         this.H = new int['\u8000'];
         this.V = new ArrayList();
@@ -1722,8 +1726,9 @@ public class World implements IBlockAccess {
 
         // MethodProfiler.a("mobSpawner"); // CraftBukkit - not in production code
         // CraftBukkit start - Only call spawner if we have players online and the world allows for mobs or animals
+        long time = this.worldData.getTime();
         if ((this.allowMonsters || this.allowAnimals) && (this instanceof WorldServer && this.getServer().getHandle().players.size() > 0)) {
-            SpawnerCreature.spawnEntities(this, this.allowMonsters, this.allowAnimals && this.worldData.getTime() % 400L == 0L);
+            SpawnerCreature.spawnEntities(this, this.allowMonsters && (this.ticksPerMonsterSpawns != 0 && time % this.ticksPerMonsterSpawns == 0L), this.allowAnimals && (this.ticksPerAnimalSpawns != 0 && time % this.ticksPerAnimalSpawns == 0L));
         }
         // CraftBukkit end
         // MethodProfiler.b("chunkSource"); // CraftBukkit - not in production code

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -357,6 +357,14 @@ public final class CraftServer implements Server {
         return this.configuration.getInt("settings.ping-packet-limit", 100);
     }
 
+    public int getTicksPerAnimalSpawns() {
+        return this.configuration.getInt("ticks-per.animal-spawns");
+    }
+
+    public int getTicksPerMonsterSpawns() {
+        return this.configuration.getInt("ticks-per.monster-spawns");
+    }
+
     public PluginManager getPluginManager() {
         return pluginManager;
     }
@@ -410,6 +418,17 @@ public final class CraftServer implements Server {
         for (WorldServer world : console.worlds) {
             world.difficulty = difficulty;
             world.setSpawnFlags(monsters, animals);
+            if (this.getTicksPerAnimalSpawns() < 0) {
+                world.ticksPerAnimalSpawns = 400;
+            } else {
+                world.ticksPerAnimalSpawns = this.getTicksPerAnimalSpawns();
+            }
+
+            if (this.getTicksPerMonsterSpawns() < 0) {
+                world.ticksPerMonsterSpawns = 1;
+            } else {
+                world.ticksPerMonsterSpawns = this.getTicksPerMonsterSpawns();
+            }
         }
 
         pluginManager.clearPlugins();

src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -982,4 +982,20 @@ public class CraftWorld implements World {
     public boolean canGenerateStructures() {
         return world.getWorldData().o();
     }
+
+    public long getTicksPerAnimalSpawns() {
+        return world.ticksPerAnimalSpawns;
+    }
+
+    public void setTicksPerAnimalSpawns(int ticksPerAnimalSpawns) {
+        world.ticksPerAnimalSpawns = ticksPerAnimalSpawns;
+    }
+
+    public long getTicksPerMonsterSpawns() {
+        return world.ticksPerMonsterSpawns;
+    }
+
+    public void setTicksPerMonsterSpawns(int ticksPerMonsterSpawns) {
+        world.ticksPerMonsterSpawns = ticksPerMonsterSpawns;
+    }
 }

src/main/resources/configurations/bukkit.yml

@@ -21,6 +21,9 @@ settings:
     update-folder: update
     ping-packet-limit: 100
     use-exact-login-location: false
+ticks-per:
+    animal-spawns: 400
+    monster-spawns: 1
 aliases:
     icanhasbukkit:
     - version