They lag because some Porter and Duff layer composition modes require textures at the size of the parent bounding box enclosing all objects. Bigger the texture, the more resource demanding the composition becomes.

Seems like there's plenty of native options here:

https://alternativeto.net/feature/infinite-canvas/

FigJam can run outside of the browser.

It always surprises me how FigJam is never mentioned in discussions around this topic, even though it’s sibling product (Figma) is so popular!

If you are on Mac then there is one called Muse (https://museapp.com/) by the authors of the site in this thread and it's as smooth as you would expect.

Lol.

Their key example is Figma…which is, effectively, a better knockoff of the native Sketch mac desktop app. It had that infinite canvas first.

“Knockoff” is not giving Figma its due credit. People loved Sketch, and now everyone in product design is using Figma. You think that happened by Figma being a knockoff?

I used "better" to imply it is better than Sketch. It is not an original idea but it's a great product.

obsidian released it

A little tangential to this but my favorite drawing program for sketching, Mischief, did this perfectly for art. Sadly the company shutdown and there are no more updates.