GNU bug report logs - #64735
29.0.92; find invocations are ~15x slower because of ignores

Previous Next

Full log

View this message in rfc822 format

From: Dmitry Gutov <dmitry <at> gutov.dev>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: luangruo <at> yahoo.com, sbaugh <at> janestreet.com, yantar92 <at> posteo.net, 64735 <at> debbugs.gnu.org
Subject: bug#64735: 29.0.92; find invocations are ~15x slower because of ignores
Date: Sun, 23 Jul 2023 22:44:23 +0300

On 23/07/2023 22:27, Eli Zaretskii wrote:
>> Far be it from me to insist, though, but if we indeed reimplemented all
>> the good parts of 'find', that would make the new function a suitable
>> replacement/improvement, at least on local hosts (instead of it just
>> being used as a fallback).
> The basic problem here is this: the regexp or pattern to filter out
> ignorables is specified as a Lisp string, which is in the internal
> Emacs representation of characters.  So to compare file names we
> receive either from Find or from a C API, we need either to decode the
> file names we receive (which in practice means they should be Lisp
> strings), or encode the regexp and use its C string payload.

Yes, the latter sounds more fiddly, but it seems to be *the* way toward 
find's performance levels. But only the benchmarks can tell whether the 
hassle is worthwhile.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.