Optimize TPSWatcher

SpigotCore_Main/src/de/steamwar/core/TPSWatcher.java

@@ -21,37 +21,39 @@ package de.steamwar.core;
 
 import org.bukkit.Bukkit;
 
+import java.util.Iterator;
 import java.util.LinkedList;
 
 public class TPSWatcher {
 
-    private static class TPSMeter {
-
     private LinkedList<Double> meter = new LinkedList<>();
-        private int count;
+    private int count = 30;
 
-        public TPSMeter(int count) {
-            this.count = count;
-        }
+    private double sum = 0;
+    private int sumCount = 0;
 
-        public void add(double tps) {
-            meter.addLast(tps);
+    private void add(double tps) {
+        sum += tps;
+        sumCount++;
+        if (sumCount > 20) {
+            meter.addLast(sum);
             if (meter.size() > count) meter.removeFirst();
+            sum = 0;
+            sumCount = 0;
+        }
     }
 
-        public double get() {
+    private double average(int count) {
+        count = Math.min(count, meter.size());
+        if (count == 0) return 20.0;
+        Iterator<Double> doubleIterator = meter.iterator();
         double total = 0;
-            for (double d : meter) total += d;
-            return total / meter.size();
+        for (int i = 0; i < count; i++) {
+            total += doubleIterator.next();
         }
-
+        return total / count;
     }
 
-    private double now = 20.0;
-    private TPSMeter one_minute = new TPSMeter(1200);
-    private TPSMeter five_minutes = new TPSMeter(6000);
-    private TPSMeter ten_minutes = new TPSMeter(12000);
-
     private long lastTime = System.currentTimeMillis();
 
     private static final double tickTimeDefault = 1000 / 20.0;
@@ -62,31 +64,29 @@ public class TPSWatcher {
             long tickTime = System.currentTimeMillis() - lastTime;
             lastTime = System.currentTimeMillis();
 
+            double now = 0;
             if (tickTime != 0) {
                 now = (tickTimeDefault / tickTime) * tickDefault;
-            } else {
-                now = 0;
             }
-            one_minute.add(now);
-            five_minutes.add(now);
-            ten_minutes.add(now);
+            add(now);
         }, 1, 1);
     }
 
-    public double getTPS() {
-        return now;
-    }
+    public enum TpsAverage {
+        LAST_SECOND(1),
+        LAST_TEN_SECONDS(10),
+        LAST_THIRTY_SECONDS(30);
 
-    public double get1TPS() {
-        return one_minute.get();
-    }
+        private int count;
 
-    public double get5TPS() {
-        return five_minutes.get();
-    }
-
-    public double get10TPS() {
-        return ten_minutes.get();
+        TpsAverage(int count) {
+            this.count = count;
+        }
+
+    }
+
+    public double getTPS(TpsAverage average) {
+        return average(average.count);
     }
 
 }