https://aescripts.com/fast-camera-lens-blur/

The Fastest Blur & Glow Effect in the World for After Effects and Premiere Pro.
Fast and Beautiful Realistic Camera Lens Blur
Renders realistic camera lens blur just like the native “Camera Lens Blur” effect of Adobe After Effects but faster, way faster!
In addition, it can also render glow that is generally expressed by combining several layers of blur.