generate files
for i in $(seq 1 1000000); do echo testing >> $i.txt; done
rm
time rm -f * -bash: /bin/rm: Argument list too long real 0m11.126s user 0m9.673s sys 0m1.278s
find with -exec rm
time find ./ -type f -exec rm {} \;
real 14m51.735s
user 2m24.330s
sys 9m48.743s
find with -delete
time find ./ -type f -delete real 5m11.937s user 0m1.259s sys 0m28.441s
perl
time perl -e 'for(<*>){((stat)[9]<(unlink))}'
real 1m0.488s
user 0m7.023s
sys 0m27.403s
rsync - empty test dir
rsync -a --delete /home/blanktest/ /home/test/ real 2m52.502s user 0m2.772s sys 0m32.649s