GNU Parallel Bug Reports Parallel is slower and results a bit different

[Jose Pablo Barrantes]

Hi, on my computer:

$ uname -a

Linux dell-17 3.2.6-2-ARCH #1 SMP PREEMPT Thu Feb 16 10:23:00 UTC 2012 i686 Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz GenuineIntel GNU/Linux

whenever I try the following:

address@hidden time find . -name '*.el' | parallel ls -la | wc -l

5345

real 0m13.176s

user 0m40.714s

sys 0m16.039s

address@hidden time find . -name '*.el' | xargs  ls -la | wc -l

5347

real 0m0.177s

user 0m0.117s

sys 0m0.120s

as you can see, with parallel it's significantly slower and results are a bit different. I'm I doing something wrong?

address@hidden parallel --version

GNU parallel 20120124

Copyright (C) 2007,2008,2009,2010,2011,2012 Ole Tange and Free Software Foundation, Inc.

License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software: you are free to change and redistribute it.

GNU parallel comes with no warranty.

Web site: http://www.gnu.org/software/parallel

When using GNU Parallel for a publication please cite:

O. Tange (2011): GNU Parallel - The Command-Line Power Tool, 

;login: The USENIX Magazine, February 2011:42-47.

Thank you,

Pablo