collect decompilation performance statistic data

libsrc/ffdec_lib/src/com/jpexs/helpers/stat/Statistics.java

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+/*
+ *  Copyright (C) 2010-2015 JPEXS, All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3.0 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.
+ */
+package com.jpexs.helpers.stat;
+
+import com.jpexs.helpers.Stopwatch;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class Statistics implements AutoCloseable {
+
+    private static final Map<String, StatisticData> map = new HashMap<>();
+
+    private final String name;
+
+    private final Stopwatch sw;
+
+    public static synchronized void addTime(String name, long duration) {
+        StatisticData s = map.get(name);
+        if (s == null) {
+            s = new StatisticData();
+            map.put(name, s);
+        }
+
+        s.value += duration;
+        if (duration > s.max) {
+            s.max = duration;
+        }
+
+        if (duration < s.min) {
+            s.min = duration;
+        }
+
+        s.count++;
+    }
+
+    public static synchronized void addToMap(Map<String, StatisticData> targetMap) {
+        for (Map.Entry<String, StatisticData> e : map.entrySet()) {
+            String name = e.getKey();
+            StatisticData d = e.getValue();
+            StatisticData d2 = targetMap.get(name);
+            if (d2 == null) {
+                d2 = new StatisticData();
+                targetMap.put(name, d2);
+            }
+
+            d2.value += d.value;
+            d2.count += d.count;
+            if (d.max > d2.max) {
+                d2.max = d.max;
+            }
+
+            if (d.min < d2.min) {
+                d2.min = d.min;
+            }
+        }
+    }
+
+    public static synchronized void print() {
+        print(map);
+    }
+
+    public static synchronized void print(Map<String, StatisticData> map) {
+        for (Map.Entry<String, StatisticData> e : map.entrySet()) {
+            String name = e.getKey();
+            StatisticData d = e.getValue();
+            System.out.println(name + ": count: " + d.count + " / total: " + (d.value / 1000000)
+                    + "ms / min: " + (d.min / 1000)
+                    + "us / max: " + (d.max / 1000)
+                    + "us / avg: " + (d.value / d.count / 1000) + "us");
+        }
+    }
+
+    public static synchronized void clear() {
+        map.clear();
+    }
+
+    public Statistics(String name) {
+        this.name = name;
+        sw = Stopwatch.startNew();
+    }
+
+    @Override
+    public void close() {
+        sw.stop();
+        addTime(name, sw.getElapsedNanoseconds());
+    }
+}