feat: 添加性能检测工具

Signed-off-by: 502647092 <admin@yumc.pw>

src/main/java/pw/yumc/YumCore/misc/Timings.java

@@ -0,0 +1,44 @@
+package pw.yumc.YumCore.misc;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+
+import pw.yumc.YumCore.bukkit.Log;
+
+/**
+ * 性能检测类
+ * Created by 蒋天蓓 on 2017/2/9 0009.
+ */
+public class Timings {
+    private static Map<String, Timings> timingsMap = new WeakHashMap<>();
+    private String name;
+    private long start;
+
+    public Timings(String name) {
+        this.name = name;
+        this.start = System.nanoTime();
+    }
+
+    public static Timings get(String string) {
+        if (!timingsMap.containsKey(string)) {
+            timingsMap.put(string, new Timings(string));
+        }
+        return timingsMap.get(string);
+    }
+
+    public static Timings clear(String string) {
+        return timingsMap.remove(string);
+    }
+
+    public void start() {
+        this.start = System.nanoTime();
+    }
+
+    public double stop() {
+        return (System.nanoTime() - start) / 1024.00 / 1024.00;
+    }
+
+    public void print() {
+        Log.d("操作 %s 耗时 %sms", name, stop());
+    }
+}