NAME

xt_difftimeofday() - Compute difference between struct timeval values

LIBRARY

#include <xtend/time.h>
-lxtend

SYNOPSIS

time_t  xt_difftimeofday(struct timeval *later, struct timeval *earlier)

ARGUMENTS

later, earlier: timeval structures populated by gettimeofday(3)

DESCRIPTION

xt_difftimeofday() returns the difference, in microseconds, between two time values returned by gettimeofday(3). This function can be used to get a good estimate of the real time elapsed in a process between any two points (where calls to gettimeofday(3) are strategically placed.)

Use of these functions should have minimal impact on run time, unless called many times to measure time of a function with a very short run time.

RETURN VALUES

The difference between the two times in microseconds

SEE ALSO

gettimeofday(2), xt_tic(3), xt_toc(3)