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From: Eli Zaretskii <eliz@gnu.org>
To: "João Távora" <joaotavora@gmail.com>
Cc: 71367@debbugs.gnu.org, acorallo@gnu.org, theo@thornhill.no, tsdh@gnu.org
Subject: bug#71367: 30.0.50; ELPA package breadcrumb causes Emacs freeze when editing json file
Date: Thu, 06 Jun 2024 14:33:26 +0300	[thread overview]
Message-ID: <86sexqgvax.fsf@gnu.org> (raw)
In-Reply-To: <CALDnm508Qf2XBubgPEOQboFWe+ofh8sZXTXsq+yCdsd34cTR2w@mail.gmail.com> (message from João Távora on Thu, 6 Jun 2024 11:07:54 +0100)

> From: João Távora <joaotavora@gmail.com>
> Date: Thu, 6 Jun 2024 11:07:54 +0100
> Cc: Andrea Corallo <acorallo@gnu.org>, tsdh@gnu.org, 71367@debbugs.gnu.org, 
> 	theo@thornhill.no
> 
> > Maybe João could suggest some trick or user option to cut down that
> > initial time to reasonable level.
> 
> No, but feel free to profile and suggest Elisp changes or algorithmic
> changes.  Maybe the vconcat re-allocations in breadcrumb--ipath-plain
> re-allocations are to blame?  It's O(N^2) allocations I think.

Could be.

> What's the length of bc--ipath-plain?  17500ish?  If so, then the
> thing would be to reserve some space in the vector upfront, but I
> don't know how to do that easily in Elisp (in CL there's VECTOR-PUSH
> and VECTOR-PUSH-EXTEND).

I'd say allocate some initial space with make-vector, and then enlarge
using vconcat or something?





  reply	other threads:[~2024-06-06 11:33 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-04 19:40 bug#71367: 30.0.50; ELPA package breadcrumb causes Emacs freeze when editing json file Tassilo Horn
2024-06-04 20:49 ` Andrea Corallo
2024-06-05  7:24   ` Tassilo Horn
2024-06-05  9:36     ` Andrea Corallo
2024-06-06  9:35       ` Eli Zaretskii
2024-06-06 10:07         ` João Távora
2024-06-06 11:33           ` Eli Zaretskii [this message]
2024-06-06 11:47             ` João Távora
2024-06-06 12:08               ` Eli Zaretskii
2024-06-06 13:00                 ` João Távora
2024-06-06 13:37                   ` Eli Zaretskii
2024-06-06 14:01                     ` João Távora
2024-06-06 14:29                       ` Tassilo Horn
2024-06-07 21:23 ` Jeremy Bryant via Bug reports for GNU Emacs, the Swiss army knife of text editors

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