Perl interface to high-resolution timer
Time::HR is a very simple interface to high-resolution timer - it only
supports one function call - gethrtime(). gethrtime() function returns
current high-resolution real time value either as 64-bit integer (on systems
with 64-bit support) or double value. Time is expressed as nanoseconds since
some arbitrary time in the past; it is not correlated in any way to the time
of day, and thus is not subject to resetting or drifting by way of adjtime or
settimeofday. The high resolution timer is ideally suited to performance
measurement tasks, where cheap, accurate interval timing is required.
Currently, this extension is only supported on Solaris, Linux and Cygwin.