1 files changed, 35 insertions, 0 deletions
diff --git a/timer.hpp b/timer.hpp
new file mode 100644
index 0000000..8d413b3
--- /dev/null
+++ b/timer.hpp
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <sys/time.h>
+#include <string>
+#include <iostream>
+#include <boost/optional.hpp>
+
+struct PerfPrinter {
+  timeval start;
+  boost::optional<std::string> msg;
+
+  PerfPrinter(boost::optional<std::string> msg) : msg(msg) {
+    if (msg)
+      std::cerr << "\r\033[K"
+		<< *msg
+		<< std::flush;
+    gettimeofday(&start,NULL);
+  }
+
+  ~PerfPrinter() {
+    if (msg)
+      std::cerr << "\r\033[K"
+		<< *msg
+		<< ": "
+		<< diff()
+		<< " s"
+		<< std::endl;
+  }
+
+  double diff() {
+    timeval stop;
+    gettimeofday(&stop,NULL);
+    return (stop.tv_sec + stop.tv_usec/1000000.0) - (start.tv_sec + start.tv_usec/1000000.0);
+  }
+};