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From: Po Lu <luangruo@yahoo.com>
To: dalanicolai <dalanicolai@gmail.com>
Cc: Emacs Devel <emacs-devel@gnu.org>
Subject: Re: Question about (excessive?) ram usage when many overlays (with large vscroll)
Date: Tue, 26 Apr 2022 20:49:28 +0800	[thread overview]
Message-ID: <87levs2enb.fsf@yahoo.com> (raw)
In-Reply-To: <CACJP=3miu=+qrqC+nQ-1RhzaDxrNWXP5e3dgd3ARr5+KphQJAw@mail.gmail.com> (dalanicolai@gmail.com's message of "Tue, 26 Apr 2022 14:21:07 +0200")

dalanicolai <dalanicolai@gmail.com> writes:

> So I have created `image-roll.el` for displaying documents/books (see
> here).  However, I have just noticed that it uses a large amount of
> RAM when viewing (or trying to) pages in the back of 'large'
> books. But even if RAM usage still looks perfectly fine, Emacs crashes
> when trying to scroll to higher page numbers.

I didn't try to reproduce this problem, but note that it's slow to
vscroll large amounts of text.  Instead, find the start of the first
line that will be visible onscreen (using window-text-pixel-size or
posn-at-point), make that the window start, and set vscroll starting
from there instead.



  parent reply	other threads:[~2022-04-26 12:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26 12:21 Question about (excessive?) ram usage when many overlays (with large vscroll) dalanicolai
2022-04-26 12:33 ` Eli Zaretskii
2022-04-26 13:24   ` Eli Zaretskii
2022-04-27 14:13     ` dalanicolai
2022-04-27 15:44       ` Eli Zaretskii
2022-04-27 17:13       ` Stefan Monnier
2022-04-27 17:18         ` Eli Zaretskii
2022-04-26 12:49 ` Po Lu [this message]
2022-04-27 14:01   ` dalanicolai
2022-04-28 11:56   ` dalanicolai
2022-04-28 12:06     ` Po Lu
2022-04-28 16:28       ` dalanicolai
2022-04-28 16:48         ` dalanicolai

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