init commit

src/host_timer.cpp

@@ -0,0 +1,15 @@
+#include "host_timer.h"
+
+HostTimer::HostTimer() {
+    reset();
+}
+
+void HostTimer::reset() {
+    start = clock::now();
+}
+
+double HostTimer::elapsed() const {
+    auto end = clock::now();
+    std::chrono::duration<double> duration = end - start;
+    return duration.count();
+}