As we all know, Perl's core sleep() only likes integers. There are, however, many places where one would like to sleep for under a second, or for periods other than what can be expressed with normal integers.

There are a few different ways to do it, and the most common ways I've seen are Time::HiRes::sleep($n) or Time::HiRes::usleep($n * 1_000_000) (which, obviously, require Time::HiRes) and select(undef, undef, undef, $n).

Are the different ways of sleeping just a personal preference, or are there some real differences (Memory/CPU usage, accuracy, ...)?

And, finally, what do you use to sleep? Personally, I've always used Time::HiRes::sleep since it's what I used the first time I needed to sleep for a split-second, and the habit just stuck then. :)

In reply to How do you sleep? by jh-

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