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OLS: On how user space sucksOLS: On how user space sucksPosted Jul 24, 2006 23:27 UTC (Mon) by cjwatson (subscriber, #7322)In reply to: OLS: On how user space sucks by ekj Parent article: OLS: On how user space sucks
On Ubuntu, pcmciautils is installed by default because - aside from its init script - it's pretty small and lightweight (compared to the monster that was pcmcia-cs/cardmgr) and it simplifies the installer, debugging the resulting system, etc. if we just install it all the time.
Per Olofsson simplified that init script a fair bit in Debian; Edgy has that simplification, and e.g. no longer calls laptop-detect.
It's also worth noting that 'case' in shell scripts doesn't spawn a subprocess, unlike 'if [ ... ]', so simply counting conditionals doesn't always give you a fair picture.
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Test, with "test" vs /usr/bin/test Posted Jul 25, 2006 3:59 UTC (Tue) by Richard_J_Neill (subscriber, #23093) [Link] "if [ a = b ] " and "if test a = b " are both shell-builtins. If you want the other one, you have to call /usr/bin/test
$ date; for ((i=0; i<10000; i++)) ; do if [ a = b ] ; then c=d ; fi ; done ;date
$ date; for ((i=0; i<10000; i++)) ; do if test a = b ; then c=d ; fi ; done ;date
$ date; for ((i=0; i<10000; i++)) ; do if /usr/bin/test a = b ; then c=d ; fi ; done ;date
It's a huge difference! The script with the builtins runs 60 times faster.
Test, with "test" vs /usr/bin/test Posted Jul 29, 2006 15:43 UTC (Sat) by kreutzm (subscriber, #4700) [Link] Where do you see that "60x"? ALso I'd advise you to use time(1) next time ;-)
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