How good is simultaneously? Within a second of each other? It is unreasonable to expect they all start during the same CPU cycle.

Thread::Barrier looks like as good a tool for the job as any. However, in my experience, getting deterministic behaviour out of threads is like herding cats.

To finely test timing details, I would recommend you look at the Time::HiRes module.

In reply to Re: multi threading by plobsing
in thread multi threading by mude

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