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diff --git a/src/stlplus/subsystems/timer.cpp b/src/stlplus/subsystems/timer.cpp
new file mode 100644
index 0000000..9faac0f
--- /dev/null
+++ b/src/stlplus/subsystems/timer.cpp
@@ -0,0 +1,59 @@
+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+#include "timer.hpp"
+#include "dprintf.hpp"
+#include "time.hpp"
+
+////////////////////////////////////////////////////////////////////////////////
+
+namespace stlplus
+{
+
+////////////////////////////////////////////////////////////////////////////////
+
+  timer::timer(void)
+  {
+    reset();
+  }
+
+  timer::~timer(void)
+  {
+  }
+
+  void timer::reset(void)
+  {
+    m_clock = clock();
+    m_time = time(0);
+  }
+
+  float timer::cpu(void) const
+  {
+    return ((float)(clock() - m_clock)) / ((float)CLOCKS_PER_SEC);
+  }
+
+  float timer::elapsed(void) const
+  {
+    return ((float)(time(0) - m_time));
+  }
+
+  std::string timer::text(void) const
+  {
+    return dformat("%4.2fs CPU, %s elapsed", cpu(), delaytime_string(time(0)-m_time).c_str());
+  }
+
+////////////////////////////////////////////////////////////////////////////////
+
+  std::ostream& operator << (std::ostream& str, const timer& t)
+  {
+    return str << t.text();
+  }
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus