$elapsed_c = tv_interval($start_time,$end_time);

##</code><code>##

$elapsed_c = tv_interval($start_time_c,$end_time_c);

##</code><code>##

$elapsed_perl = tv_interval($start_time,$end_time);

##</code><code>##

$elapsed_perl = tv_interval($start_time_perl,$end_time_perl);