Lvgl can Gaussian blur be supported?

When I asked this question in issues on github,

the author’s reply was like this:
“For performance reasons now you can perform only box-blur. However. in practice performing box-blur twice looks quite similar to Gaussian blur.”

But i want to know why you say “For performance reasons now you can perform only box-blur”?

My CPU frequency is 1G HZ

Also, are there any useful third-party libraries or examples? i want to test

Thanks a lot, I don’t know much about Gaussian blur and box-bur yet.

Mainly we are targeting slower devices that’s why the preference for the faster blur.

What do you want to blur? An lv_canvas?

Maybe I didn’t describe my problem clearly, you can see the description of my other problem, the description there is more clear