The app is very slow when cache is too big

[ericzolf]

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• I have searched the issues tracker for a bug report similar to mine, in vain

Ferdium Version

6.7.6

What Operating System are you using?

Other Linux

Operating System Version

Fedora Linux 40 (Cinnamon, X11)

What arch are you using?

x64

Last Known Working Ferdium version

n/a

Expected Behavior

The application remains snappy independently of the size of the cache.

Actual Behavior

The app reacts very slowly to keyboard inputs and to movements and clicks of the mouse, like 4-5 seconds before the letters typed appear or the highlighting/cursor appears where it should be. The mouse itself moves normally, it's the reaction of the app which is very sluggish.

Steps to reproduce

Reproducing the issue is difficult, but it happens on a regular basis each 1 or 2 weeks.
Getting rid of the slowness is relatively easy and tells me that there is an issue with the caching mechanism:

1. File -> Settings -> Advanced -> Cache (the size is somewhere between 2 and 3 GB big)
2. Clear cache (the cache size drops to 600-700MB)
3. Restart the app
4. Problem gone

Debug link

https://debug.ferdium.org/89895684-53a4-4f49-9fbc-21f203dc8064

Screenshots

n/a

Additional information

The issue isn't new, it already happened at least under Fedora 39, probably earlier, I just wasn't sure if it was an app or GPU/driver issue. Finding out the workaround with cleaning the cache tells me that it's an app issue.
And the rest of the system isn't impacted by the slowness, it's only Ferdium.