Remove unoptimized implementation of conditionalEntropy

tests/Timer.h

@@ -0,0 +1,41 @@
+#pragma once
+#include <chrono>
+#include <string>
+#include <sstream>
+
+namespace platform {
+    class Timer {
+    private:
+        std::chrono::high_resolution_clock::time_point begin;
+        std::chrono::high_resolution_clock::time_point end;
+    public:
+        Timer() = default;
+        ~Timer() = default;
+        void start() { begin = std::chrono::high_resolution_clock::now(); }
+        void stop() { end = std::chrono::high_resolution_clock::now(); }
+        double getDuration()
+        {
+            stop();
+            std::chrono::duration<double> time_span = std::chrono::duration_cast<std::chrono::duration<double >> (end - begin);
+            return time_span.count();
+        }
+        double getLapse()
+        {
+            std::chrono::duration<double> time_span = std::chrono::duration_cast<std::chrono::duration<double >> (std::chrono::high_resolution_clock::now() - begin);
+            return time_span.count();
+        }
+        std::string getDurationString(bool lapse = false)
+        {
+            double duration = lapse ? getLapse() : getDuration();
+            return translate2String(duration);
+        }
+        std::string translate2String(double duration)
+        {
+            double durationShow = duration > 3600 ? duration / 3600 : duration > 60 ? duration / 60 : duration;
+            std::string durationUnit = duration > 3600 ? "h" : duration > 60 ? "m" : "s";
+            std::stringstream ss;
+            ss << std::setprecision(2) << std::fixed << durationShow << " " << durationUnit;
+            return ss.str();
+        }
+    };
+} /* namespace platform */