On another system (Thinkpad T60p), before the change:
[EMAIL PROTECTED]:~# echo performance > 
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
[EMAIL PROTECTED]:~# time for i in $(seq 100); do modprobe -q foobar; done

real    0m4.472s
user    0m4.312s
sys     0m0.164s

after the change:
real    0m4.045s
user    0m3.840s
sys     0m0.292s

** Attachment added: "bootchart on T60p before the change"
   http://launchpadlibrarian.net/18260105/hardy-20081006-1.png

-- 
SRU: We could make modprobe less slow by building it with proper CFLAGS
https://bugs.launchpad.net/bugs/276096
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