Subject: bug#68006: 30.0.50; Image-mode speed

From: Eli Zaretskii <[email-masked]>
Date: Tue, 26 Dec 2023 20:43:13 +0200

> From: Manuel Giraud <[email-masked]>
> Cc: [email-masked]
> Date: Tue, 26 Dec 2023 19:07:00 +0100
> 
> Eli Zaretskii <[email-masked]> writes:
> 
> > The comparison with times-less-p is also risky: what if someone
> > replaces the image file with an older file?
> 
> I don't understand what the risk is here?  It is just a cache.

The risk is that you won't notice the fact that the image file was
replaced.

> > I'd trust some kind of file checksum better, which we will have to
> > store alongside the image spec or as part of it.  (Don't we already do
> > something like that somewhere in image-*.el files?)
> 
> For image-dired, there is 'image-dired-contents-sha1'.  Maybe this the
> one you thought about?

Probably.