In Time::Hires, there are two simple ways to measure time intervals, namely 
   use Time::HiRes qw(gettimeofday tv_interval);
   $t0 = [gettimeofday];
   $elapsed = tv_interval($t0)

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or 
   use Time::HiRes qw(time);
   $t0 = time;
   $elapsed = time - $t0;

[download]
Is one of these two methods preferrable, considering accuracy and performance? As both gettimeofday and time provide accuracy up to microseconds, it seems to me that the accuracy of both time intervals are equivalent.

Thank you for your help!

Update: added use Time::HiRes to the code above.

In reply to Measuring time intervals using Time::HiRes -- time vs. gettimeofday and tv_interval by hrr

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