The performance on my S21 Ultra is pretty bad. Feels like ~40fps and stuttering. Also, it doesn't have mobile interaction for dragging nodes. I can only pan the canvas.
Bit off topic but I really dig the clean look and feel of this. Is there anything close in Flutter? Think building this in Flutter might improve performance for your case (running on a high end samsung phone)
Surely if react/svelte etc are built well they're relatively low processor / compute? When manipulating canvas / images / rich-whatever, I assume graphic accelerated functions would work substantially better than alternatives.