Thank you for this hint! I obtained similar benchmark results as you did.

Surprsingly, using Time::HiRes::time instead of the standard time, the performance is much better (but still worse than tv_interval): 
          Rate Hires  Time
Hires  98201/s    --  -55%
Time  220149/s  124%    --

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In reply to Re^2: Measuring time intervals using Time::HiRes -- time vs. gettimeofday and tv_interval by hrr
in thread Measuring time intervals using Time::HiRes -- time vs. gettimeofday and tv_interval by hrr

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