bug#50733: 28.0.1; project-find-regexp can block Emacs for a long time

[Daniel Martín]

Eli Zaretskii <eliz@gnu.org> writes:

>> 
>> I usually work on a monorepo with ~67000 tracked files (many of them big
>> binary files).  Here's what I get when using ripgrep as the xref search
>> program:
>> 
>> Elapsed time: 36.087181s (8.067474s in 22 GCs)
>> 
>> Running the same search with ripgrep from the command line takes around
>> 6 seconds.
>
> How many matches does that report?

~70400 matches spread across ~3700 files.  Perhaps it's an extreme case
(I used a generic search term, "color").  I tried a more specific search
term ("clang analyzer") which returned 30 matches across 14 files.
Here's the benchmark:

Elapsed time: 10.176629s (0.946311s in 2 GCs)

I guess the command could signal ongoing progress somehow, to assure the
 user that Emacs is actually working and not frozen.