basic version of profiler class

ml_profiler.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "ml.h"
+
+#include <unordered_map>
+
+class MlPerfMon {
+
+private:
+    MlPerfMon() : perfOn(false) {};
+
+public:
+
+    // https://stackoverflow.com/questions/43523509/simple-singleton-example-in-c
+    static MlPerfMon& instance(){
+        static MlPerfMon instance;
+        return instance;
+    }
+
+    void turnOn();
+
+    void add_method_call(const std::string &method);
+    void print_results();
+
+private:
+    bool perfOn;
+    std::unordered_map<std::string, long> calls_counter;
+};