It go fast

engine/src/main/java/com/volmit/iris/util/FloatNoiseCache.java

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+package com.volmit.iris.util;
+
+public class FloatNoiseCache {
+    private final int width;
+    private final int height;
+    private final float[] cache;
+
+    public FloatNoiseCache(int width, int height)
+    {
+        this.width = width;
+        this.height = height;
+        cache = new float[width * height];
+    }
+
+    public void set(int x, int y, float v) {
+        this.cache[y % this.height * this.width + x % this.width] = v;
+    }
+
+    public float get(int x, int y) {
+        return this.cache[y % this.height * this.width + x % this.width];
+    }
+}

engine/src/main/java/com/volmit/iris/util/ShortNoiseCache.java

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+package com.volmit.iris.util;
+
+public class ShortNoiseCache {
+    private final int width;
+    private final int height;
+    private final short[] cache;
+
+    public ShortNoiseCache(int width, int height)
+    {
+        this.width = width;
+        this.height = height;
+        cache = new short[width * height];
+    }
+
+    public void set(int x, int y, short v) {
+        this.cache[y % this.height * this.width + x % this.width] = v;
+    }
+
+    public short get(int x, int y) {
+        return this.cache[y % this.height * this.width + x % this.width];
+    }
+}

engine/src/main/java/com/volmit/iris/util/WorldHeight.java

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+package com.volmit.iris.util;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class WorldHeight {
+    private final int minHeight;
+    private final int maxHeight;
+
+    public WorldHeight(int maxHeight) {
+        this(0, maxHeight);
+    }
+
+    public int getTotalHeight() {
+        return maxHeight - minHeight;
+    }
+}