multiprocess zgrep

gistfile1.sh

$ time find /opt/local/share/emacs/23.4/lisp/ -type f -name \*.gz -exec zgrep --color=yes -H -n -e "conf-mode" {} \;
real 0m12.239s
user 0m7.327s
sys  0m6.804s

$ time find /opt/local/share/emacs/23.4/lisp/ -type f -name \*.gz -exec zgrep --color=yes -H -n -e "conf-mode" {} +
real 0m8.574s
user 0m4.950s
sys  0m5.995s

$ time find /opt/local/share/emacs/23.4/lisp/ -type f -name \*.gz -print | parallel zgrep --color=yes -H -n -e "conf-mode"
real 0m5.092s
user 0m13.632s
sys  0m14.330s

$ time find /opt/local/share/emacs/23.4/lisp/ -type f -name \*.gz -print0 | xargs -0 -n 1 -P $( sysctl -n hw.ncpu ) zgrep --color=yes -H -n -e "conf-mode"
real 0m3.322s
user 0m10.596s
sys  0m10.220s

Useful!