Noisy edges preview in 2.29 for windows

Support Basics & Interface
1

In 2.29 the preview of a rendering with edges is still noisy like in the 2.28 release.
This happens if the image is bigger than 500x500.
It doesn’t happen in 2.27.
Do you know why?

http://westfalia.altervista.org/edge/2.28.jpg
2.29 F12

http://westfalia.altervista.org/edge/2.27.jpg
2.27 F12

the file:
http://westfalia.altervista.org/edge/prova.edge.zip155kb
http://westfalia.altervista.org/edge/prova.edge.blend540kb

2

that is because the draw edges thing draws the edges of every face, but it is odd the size thing.