basic version of profiler class

ml_profiler.cpp

@@ -0,0 +1,44 @@
+
+#include "ml_profiler.h"
+
+#include <iostream>
+#include <iomanip>
+
+void MlPerfMon::turnOn() {
+    perfOn = true;
+
+}
+
+void MlPerfMon::add_method_call(const std::string &method) {
+    if (perfOn) {
+        auto search = calls_counter.find(method);
+        if (search != calls_counter.end()) {
+            calls_counter[method] = search->second + 1;
+        } else {
+            calls_counter.insert({method, 1});
+        }
+    }
+}
+
+void MlPerfMon::print_results() {
+    if (perfOn) {
+         std::cerr << std::endl << std::endl << "Call Frequency" << std::endl;
+
+        using callcount = std::pair<std::string, long>;
+
+        std::vector<callcount> v(begin(calls_counter), end(calls_counter));
+        std::sort(std::begin(v), std::end(v), [](const callcount& a, const callcount& b) { return a.second > b.second; });
+
+        int i {0};
+        for(auto &p : v) {
+            // TODO when method name longer than 15 chars, here it crashes
+            p.first.insert(p.first.end(), 15 - p.first.size(), ' ');
+            std::cerr << p.first << " " << p.second << std::endl;
+
+            i++;
+            if (i > 10) break;
+        }
+
+        std::cerr << std::endl;
+    }
+}