I can't reproduce the issue here (linux, 12 core x86_64; I tried various perls from 5.10.1 to 5.34.0).

With sleep 1, I get a total running time of the program of 1m 40s (consistent with each thread in parallel doing 100 1s sleeps), and with sleep 0.0001, I get a total running time of 2.5s, which seems reasonable for all the overhead of setting up and tearing down 50 threads plus the overhead of doing 50000 calls to system().

Dave.

In reply to Re: Perl threads loss of performance with system call by dave_the_m
in thread Perl threads loss of performance with system call by daniel85

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