Dune::Timer Class Reference

A simple stop watch. More...

#include <dune/common/timer.hh>

Public Member Functions
	Timer (bool startImmediately=true) noexcept
	A new timer, create and reset. More...
void	reset () noexcept
	Reset timer while keeping the running/stopped state.
void	start () noexcept
	Start the timer and continue measurement if it is not running. Otherwise do nothing.
double	elapsed () const noexcept
	Get elapsed user-time from last reset until now/last stop in seconds.
double	lastElapsed () const noexcept
	Get elapsed user-time from last start until now/last stop in seconds.
double	stop () noexcept
	Stop the timer and return elapsed().

Detailed Description

A simple stop watch.

This class reports the elapsed user-time, i.e. time spent computing, after the last call to Timer::reset(). The results are seconds and fractional seconds. Note that the resolution of the timing depends on your OS kernel which should be somewhere in the millisecond range.

The class is basically a wrapper for the libc-function getrusage()

Warning

In a multi-threading situation, this class does NOT return wall-time! Instead, the run time for all threads will be added up. For example, if you have four threads running in parallel taking one second each, then the Timer class will return an elapsed time of four seconds.

Constructor & Destructor Documentation

Timer()

Dune::Timer::Timer ( bool  startImmediately = true )

inlinenoexcept

A new timer, create and reset.

Parameters

startImmediately

If true (default) the timer starts counting immediately

References reset().

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The documentation for this class was generated from the following file:

• dune/common/timer.hh