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bug#38187: 27.0.50; No mouse-wheel scaling on images
From: |
Juri Linkov |
Subject: |
bug#38187: 27.0.50; No mouse-wheel scaling on images |
Date: |
Fri, 22 Nov 2019 00:57:24 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-linux-gnu) |
>> BTW, while testing it for image scaling on a quite small image file,
>> Emacs consumed several GB of all available memory and almost all swap,
>> before I noticed and evaluated M-: (clear-image-cache) that freed memory.
>>
>> Memory leak?
>
> No, it's just that Emacs' image cache is very primitive. You can easily
> get Emacs to go out-of-memory by just doing a
>
> (dolist (file (directory-files dir-with-lots-of-images))
> (erase-buffer)
> (insert-image (create-image file)))
>
> You get the same effect by altering the scaling factor, I think? Each
> scaled image is cached? So by rolling the wheel ten clicks you get ten
> cached copies of the image.
>
> A better eviction algorithm would be nice.
Currently the default value of image-cache-eviction-delay is
300 seconds.
But the documentation also says:
"If the cache contains a large number of images,
the actual eviction time may be shorter."
And code has this comment:
/* If the number of cached images has grown unusually large,
decrease the cache eviction delay (Bug#6230). */
Does this mean the number of cached images was not large enough?
- bug#38187: 27.0.50; No mouse-wheel scaling on images, (continued)
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Juri Linkov, 2019/11/17
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Lars Ingebrigtsen, 2019/11/18
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Juri Linkov, 2019/11/18
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/18
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Juri Linkov, 2019/11/20
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/20
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Alan Third, 2019/11/21
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Juri Linkov, 2019/11/21
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Lars Ingebrigtsen, 2019/11/21
- bug#38187: 27.0.50; No mouse-wheel scaling on images,
Juri Linkov <=
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Lars Ingebrigtsen, 2019/11/21
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Lars Ingebrigtsen, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Alan Third, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Alan Third, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Eli Zaretskii, 2019/11/22
- bug#38187: 27.0.50; No mouse-wheel scaling on images, Lars Ingebrigtsen, 2019/11/19