move Timer class to header, use it in q3map2

libs/timer.h

@@ -0,0 +1,45 @@
+/*
+	 Copyright (C) 2001-2006, William Joseph.
+   All Rights Reserved.
+
+   This file is part of GtkRadiant.
+
+   GtkRadiant is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   GtkRadiant is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GtkRadiant; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#pragma once
+
+#include <chrono>
+
+
+class Timer
+{
+	std::chrono::time_point<std::chrono::steady_clock> m_start;
+public:
+	Timer(){
+		start();
+	}
+	void start(){
+		m_start = std::chrono::steady_clock::now();
+	}
+	int elapsed_msec() const {
+		return std::chrono::duration_cast<std::chrono::milliseconds>( std::chrono::steady_clock::now() - m_start ).count();
+	}
+	double elapsed_sec() const {
+		return std::chrono::duration<double>( std::chrono::steady_clock::now() - m_start ).count();
+	}
+};
+
+