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Re: Add sleep builtin

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

#14521 — Re: Add sleep builtin

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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