Enabling shadows on xrender slows down picom

[siduck]

Hi, just got to know that picom finally supports animations, after trying it it asked me to specify backend in the config

I added glx and then the ram usage got high, upto 170 mb

I was using picom-ftlabs-git on aur before, animations work great there + dont have to use glx and it barely takes 10mb!

https://github.com/user-attachments/assets/fef14811-8dee-4784-afb3-68237e921f48

[yshui]

170mb memory usage can hardly be considered high (you have 30GB! 170mb is only 0.6%). and you don't have to use glx if you don't want to, animation works on xrender.

[siduck]

170mb memory usage can hardly be considered high (you have 30GB! 170mb is only 0.6%).

I get nice animations and all, on picom-ftlabs-git package previous picom forks with animations in just 10 mb! which is so cool but i feel like the the new picom has increased ram usage

Xrender feels so laggy when enabling shadows

https://github.com/user-attachments/assets/11141826-ebcb-4b8e-a5a8-2b7120e78859

[yshui]

in just 10 mb!

does picom-ftlabs still use 10 mb on glx? glx do use more memory but that's mostly from the gl driver. and i personally won't worry about a difference so small (again, 0.6%).

laggy when enabling shadows

now, that's the real problem here. shadows shouldn't be this slow, and in fact it is not on my machine.

what GPU do you have?

[siduck]

[siduck]

does picom-ftlabs still use 10 mb on glx?

No, it uses 170mb too. i think by default it uses xrender.

On Original picom , i get below 10 mb with xrender too! but the shadows make things slow, weird

[yshui]

does cpu usage go up when picom lags?

[siduck]

not at all

[siduck]

also i didnt face the lag on the picom version 11.2, when picom didnt had animations support

https://github.com/user-attachments/assets/cd05e138-ba1a-4ca1-977d-c96f632d2693

[yshui]

not at all

does turning off vsync and/or frame-pacing change anything?

[yshui]

this is a duplicate of #1349

[siduck]

not at all

does turning off vsync and/or frame-pacing change anything?

unfortunately no

[siduck]

@yshui i recently added a new gpu ( was using IGPU before ), now i no longer face this lag