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Re: Should [[ -v 1 ]] be supported?

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  Re: Should [[ -v 1 ]] be supported? Chet Ramey <chet.ramey@case.edu> - 2018-12-28 18:23 -0600

#14993 — Re: Should [[ -v 1 ]] be supported?

On 12/27/18 11:32 PM, Peng Yu wrote:
>> You're whacking moles.  Use a profiler.  That's what they're for.
> 
> I've already shown that $() is a major problem to slow down the speed
> and I have reduced using its usage in my code and significantly
> improved the performance. 

This isn't a major deductive leap, since command substitution forks a
child and reads through a pipe. Forking is always more expensive than
not.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
		 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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