Very much appreciated. Thanks. On Thu, Apr 30, 2020 at 1:00 PM Shigio YAMAGUCHI <[email protected]> wrote:
> OK. I have added this plan to the TODO list. > [https://www.gnu.org/software/global/plans.html] > Thank you for the request! > > Regards, > Shigio > > 2020年4月30日(木) 16:41 Marcus Harnisch <[email protected]>: > > > > Hi Shigio > > > > Yes, of course. Here is the sequence of commands (grepping for the fixed > string “grep”). You may want to run a dummy command first to fill the file > system cache. > > $ cd emacs-master > > $ gtags > > $ du -ch $(global -P) | tail -n 1 > > 79M total > > $ time global -g grep > /dev/null > > > > real 0m0,261s > > user 0m0,257s > > sys 0m0,004s > > $ time grep -l grep $(global -P) >/dev/null > > > > real 0m0,064s > > user 0m0,048s > > sys 0m0,016s > > $ time rg -l grep $(global -P) >/dev/null > > > > real 0m0,027s > > user 0m0,036s > > sys 0m0,020s > > > > Regards, > > Marcus > > > > On Thu, Apr 30, 2020 at 6:28 AM Shigio YAMAGUCHI <[email protected]> wrote: > >> > >> Hi Marcus, > >> Could you please give me an example of the command line to understand > the issue? > >> I'm not sure what you did. > >> > >> Thanks, > >> Shigio > >> > >> 2020年4月30日(木) 6:12 Marcus Harnisch <[email protected]>: > >> > > >> > Hi Shigio > >> > > >> > Until now I hadn't noticed that global has its own grep > implementation. > >> > It turns out that running ‘grep -l’ with a fixed string pattern on > the list of files obtained with ‘global -P’ consumes about a quarter of the > time of the corresponding ‘global -g’ command in a non-trivial code base > (emacs-master, total size of files searched amounting to 79MB). > >> > Modern grep replacements, such as ripgrep ( > https://github.com/BurntSushi/ripgrep) are even faster than that. Exact > numbers will obviously differ based on the actual pattern used. > >> > Perhaps grep() could be changed to off-loading to an external tool > (possibly even configurable via gtags.conf) > >> > > >> > Thanks, > >> > Marcus > >> > >> > >> > >> -- > >> Shigio YAMAGUCHI <[email protected]> > >> PGP fingerprint: > >> 26F6 31B4 3D62 4A92 7E6F 1C33 969C 3BE3 89DD A6EB > > > > -- > Shigio YAMAGUCHI <[email protected]> > PGP fingerprint: > 26F6 31B4 3D62 4A92 7E6F 1C33 969C 3BE3 89DD A6EB >
