fn() sysTime

Returns the system time in seconds.

/*!
 * @fn sysTime
 * 
 * @headerfile <seqan/basic.h>
 * 
 * @brief Returns the system time in seconds.
 * 
 * @signature double sysTime();
 * 
 * @return double A <tt>double</tt>, system time stamp in seconds. Types:
 *                nolink:double
 * 
 * In contrast to @link cpuTime @endlink, the system time corresponds to the
 * wall clock time under Linux and Mac OS X. Under Windows sysTime returns the
 * result of cpuTime.
 * 
 * Use this for benchmarking uner Linux and Mac Os X.
 * 
 * Calls <tt>clock_gettime</tt> under Linux and <tt>gettimeofday</tt> under Mac
 * OS X.
 * 
 * @section Examples
 * 
 * We can use sysTime to instrument our code for profiling/timing information
 * quite robustly. The following demonstrates how the Function.sysTime is used
 * in many SeqAn apps for collecting timing information.
 * 
 * @code{.cpp}
 * bool printTiming = true;
 * 
 * // ...
 * 
 * double startTime = sysTime();
 * // Do some complex calculation.
 * if (printTiming)
 *     std::cerr << "Some complex calculation too " << sysTime() - startTime << " s." << std::endl;
 * @endcode
 * 
 * 
 * @see cpuTime
 */