On Tue, 30 Jan 2001 04:13:39 -0500, Michael G Schwern wrote:
>Is there any really good reason why sleep() doesn't work for
>microseconds? I mean, if I can do this:
>
> sub sleep {
> my($time) = shift;
> if( /^[+-]?\d+$/ ) {
> sleep($time);
> }
> else {
> select(undef, undef, undef, $time);
> }
> }
>
>Why can't Perl?
One of your problems is that sleep(3) is NOT garanteed to sleep exactly
3 full seconds. It's only garanteed that the difference between time()
before, and after, will be (at least) 3. So sleep 3 actually just has to
wait for 3 time second rollovers. That may take for example only 2.5
seconds.
Well, that's how it *used* to be. Maybe perl's behaviour has been
changed since then.
If you expect sleep(2.5) to work properly, then sleep(3) should be
fixed, too.
--
Bart.
