Thanks you all, i found the problem. ForManager module has 'waitpid_blocking_sleep' parameter, which defined as 1 second by default. There is a function called 'set_waitpid_blocking_sleep' which we can defined this parameter (sleep time). We can set zero or fraction of seconds. I set this paramter to zero and it fixed my issue.

In reply to Re: Parallel::ForkManager takes too much time to start 'finish' function by ohadk
in thread Parallel::ForkManager takes too much time to start 'finish' function by ohadk

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