Beta 2.6b4 SAAO settings might not be working.

[Panos]

Decided tonight to change my AA from 2x MSAA to 2x SSAA knowing well that I would get a nice FPS penalty.

So after that decided to going through one setting at the time to find out what can be altered to improve the FPS.

Apparently SSAO regardless if set to Low/Normal/High doesn't affect the fps performance or the image quality as it should. Only turning SSAO off, getting a 20% FPS improvement.

Here are the examples of what talking about.
LOW
https://i.imgur.com/Eb9CzEd.jpg

HIGH
https://i.imgur.com/wszivjT.jpg

OFF
https://i.imgur.com/tM92Nz4.jpg

Clearly can be seen that Low & High have no impact in visual quality, and fps remained the same 53 on that scene. Turning SAAO off, the fps jumped to 67 but of course the image quality is worse (shadows around objects in shade gone).

Surely changing SSAO settings from High to Low should have improved FPS and worsen a bit the image quality no?