Cinnamon - Nemo has a delay in displaying picture thumbnail images

[Harry-W-Haines-III]

Symptom: When returning to a previous directory where an image file has already had a thumbnail generated and cached, there is a delay in displaying the thumbnail image in Nemo. In Mint 19.3 on the same hardware, it is instantaneous.
This has been seen on several computers so I am not sure it is a graphics kernel/driver issue.
I am logging this because this seems to be a regression.

How to reproduce. Save a screen shot to ~/Downloads. Go to ~/Downloads to view/open the file in Nemo. Navigate away. Navigate back to ~/Downloads and observe the issue.
Hardware is an i7-4790 with GeForce GTX 1050 Ti just for reference.

[pasch256]

yeap i think have to be the reading of the cache... in my vm.. take a fraction of the seg. show the thumnail. in 19.3, is more faster, much much faster.

[mtwebster]

Hi, check out https://www.linuxmint.com/rel_ulyana_cinnamon_whatsnew.php under Cinnamon 4.6 for more of an explanation. This was deliberately done to improve directory loading performance.

Some further details:
linuxmint/nemo@bb049a4
linuxmint/nemo@4386080

[Harry-W-Haines-III]

But I shouldn't be seeing it in a top directory with only one file in the directory. Not on a system of that performance with a SSD drive.

…

On Mon, Jun 15, 2020 at 1:16 PM Michael Webster ***@***.***> wrote: Hi, check out https://www.linuxmint.com/rel_ulyana_cinnamon_whatsnew.php under Cinnamon 4.6 for more of an explanation. This was deliberately done to improve directory loading performance. Some further details: ***@***.*** <linuxmint/nemo@bb049a4> ***@***.*** <linuxmint/nemo@4386080> — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#14 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AK34WEOVZLPI36XHU7TWPVTRWZJP3ANCNFSM4N5MKKUQ> .

[mtwebster]

Ah you might have a point, I'll do something to try improve this for less-populated folders.

[Harry-W-Haines-III]

Thank you kindly for at least taking another look at it. When I first saw it, I thought there was something wrong with my graphics and tried it on other computers and different directory levels.

[mtwebster]

linuxmint/nemo@07e18af

This should take care of the issue.