RFC: ldconfig speedup

[Andreas Jaeger]

Florian Weimer <fw@deneb.enyo.de> writes:

> * Andreas Jaeger:
>
>> Flush filesystem cache, create from scratch:
>> # echo 3 > /proc/sys/vm/drop_caches;time ldconfig -i
>>
>> real    0m24.234s
>> user    0m0.148s
>> sys     0m0.408s
>
> Out of curiosity, is this on ext3?  Have you tried different file
> systems?

This is ext3, I haven't tried others.

> (I would expect that sorting by the d_ino field returned by readdir
> before touching the files would bring a comparable speed-up, at lesser
> complexity.)

I doubt it - it would still mean reading the libraries itself and the
patch avoids reading the libraries.  Sorting by d_ino might help if
there's no cache,

Andreas
-- 
 Andreas Jaeger, Director Platform/openSUSE, aj@suse.de
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