added runtime in ms to -p option

ml_profiler.cpp

@@ -3,10 +3,14 @@
 
 #include <iostream>
 #include <iomanip>
+#include <numeric>
+
+
+using namespace std::chrono;
 
 void MlPerfMon::turnOn() {
     perfOn = true;
-
+    start_time = std::chrono::high_resolution_clock::now();
 }
 
 void MlPerfMon::add_method_call(const std::string &method) {
@@ -22,21 +26,32 @@ void MlPerfMon::add_method_call(const std::string &method) {
 
 void MlPerfMon::print_results() {
     if (perfOn) {
-         std::cerr << std::endl << std::endl << "Call Frequency" << std::endl;
+        std::chrono::time_point<std::chrono::high_resolution_clock> end_time = std::chrono::high_resolution_clock::now();
 
         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; });
+        long total_calls = 0;
+        for(auto const& c : v) { total_calls += c.second; }
+
+        std::cerr << std::endl << std::endl;
+        std::cerr << "perf stats" << std::endl;
+        std::cerr << "run time       : " << duration_cast<milliseconds>(end_time - start_time).count() << " ms " << std::endl;
+        std::cerr << "total calls    : " << total_calls << std::endl;
+        std::cerr << "methods called : " << calls_counter.size() << std::endl;
+        std::cerr << std::endl;
 
         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(), ' ');
+            if (p.first.size() >= method_name_print_len)
+                p.first.erase(method_name_print_len, std::string::npos);
+             else
+                p.first.insert(p.first.end(), method_name_print_len - p.first.size(), ' ');
+
             std::cerr << p.first << " " << p.second << std::endl;
 
             i++;
-            if (i > 10) break;
+            if (i > print_top_methods) break;
         }
 
         std::cerr << std::endl;