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Re: GNU Parallel Bug Reports Parallel is slower and results a bit differ


From: Andreas Bernauer
Subject: Re: GNU Parallel Bug Reports Parallel is slower and results a bit different
Date: Fri, 24 Feb 2012 17:02:38 +0100
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2

On 2/23/12 16:46, Jose Pablo Barrantes wrote:
> address@hidden time find . -name '*.el' | parallel ls -la | wc -l
> 5345
> 
> real 0m13.176s
> user 0m40.714s
> sys 0m16.039s
> 
> as you can see, with parallel it's significantly slower and results are
> a bit different. I'm I doing something wrong?
> 

Try passing the -X switch:

$ time (find . -name '*.h' | parallel -X  ls -la | wc -l)
    2712

real    0m0.288s
user    0m0.250s
sys     0m0.106s

Still slower than xargs, though.





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