Hello Gurus, I am writing simple timer for my perl script and got confusion. My assumption was that Real Time = USER+SYSTEM time, but this is not true. For example: 
$ time ls
real     0m0.006s
user 0m0.001s
sys     0m0.004s

real > user+sys

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How it can be? I want to understand this situation, because of this depends what to use - perl built-in times() or Time::HiRes::gettimeofday functions.

In reply to Timer implementation by bash

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