bug#49836: Support ripgrep in semantic-symref-tool-grep

[Eli Zaretskii]

> From: Mattias Engdegård <mattiase@acm.org>
> Date: Sat, 18 Sep 2021 16:18:54 +0200
> Cc: juri@linkov.net, larsi@gnus.org, 49836@debbugs.gnu.org, dgutov@yandex.ru
> 
> > The sub-process communications infrastructure, of course.
> 
> Yes, very likely, but also post-processing the output from the search process 
> (matching, sorting, etc) and preparing it for display. It would be 
> interesting to see a break-down and to see what if anything can be down to 
> make to go faster.

You could build Emacs with profiling and run that, I guess.

And on GNU/Linux, there's Perf.