Eric Dumazet 8af27e1dc4 fixdep: use hash table instead of a single array ... I noticed fixdep uses ~2% of cpu time in kernel build, in function use_config() fixdep spends a lot of cpu cycles in linear searches in its internal string array. With about 400 stored strings per dep file, this begins to be noticeable. Convert fixdep to use a hash table. kbuild results on my x86_64 allmodconfig Before patch : real 10m30.414s user 61m51.456s sys 8m28.200s real 10m12.334s user 61m50.236s sys 8m30.448s real 10m42.947s user 61m50.028s sys 8m32.380s After: real 10m8.180s user 61m22.506s sys 8m32.384s real 10m35.039s user 61m21.654s sys 8m32.212s real 10m14.487s user 61m23.498s sys 8m32.312s Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>		2010-11-11 17:12:06 +01:00
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.gitignore	Update .gitignore files for generated targets	2008-10-20 11:24:31 -07:00
docproc.c	kbuild: add static to prototypes	2009-09-20 12:27:44 +02:00
fixdep.c	fixdep: use hash table instead of a single array	2010-11-11 17:12:06 +01:00
hash.c	kbuild: add static to prototypes	2009-09-20 12:27:44 +02:00
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