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Groups > gnu.bash.bug > #14521

Re: Add sleep builtin

From L A Walsh <bash@tlinx.org>
Newsgroups gnu.bash.bug
Subject Re: Add sleep builtin
Date 2018-08-21 18:11 -0700
Message-ID <mailman.5389.1534900413.1292.bug-bash@gnu.org> (permalink)
References <CAJnmqwZ1GUZRtGRHt8xy_-tdTjVsAQKt-toGAEn5e9gjFrR0vQ@mail.gmail.com> <83513822-23BF-4695-9542-F967512A8A3D@gmail.com>

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Clint Hepner wrote:
>> On Aug 19, 2018, at 10:25 AM, konsolebox <konsolebox@gmail.com> wrote:
>>
>> Hi Chet,
>>
>> The sleep command is often used in loops and using the external sleep
>> is expensive.  
>>     
>
> Expensive is relative, as the time spent actually sleeping probably dwarfs the startup time. If not, you probably want to find an alternative to polling anyway.
>   

If he implements sleep with the floating point option then the above might
not be true:

sleep .001 (ms sleep)...not practical if loaded each time)
I often use sleep .1/.3/.5 ... if the builtin doesn't support sleep times
< 1 second, then it's probably not worth it.

Also, needs to actually sleep for the listed time.

I  remember some implementations only wait till the clock reaches the
new time in seconds -- meaning that the actual sleep time could be
.001 seconds.


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Re: Add sleep builtin L A Walsh <bash@tlinx.org> - 2018-08-21 18:11 -0700

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