[BUG] killing speed dropping in 3D rendering while using exp

Whats upp!
I've checked this issue on Fu6.4 and 7.5.. result the same.
Short Description:
If I use expression on ImagePlane subdivision's parameters (didn't tested other tools and params ..) - scene rendering become pretty slow! - like 1 frame per second on OpenGL rendering in any resolution.. (even 100x100)

Scene screenshot

FuBug_expr_01.JPG (101.71 KiB) Viewed 2046 times

PS: haha... seems I still can't upload fusion comp file into this Fusion forum... nice..

Zip should work. Saves bandwidth

Indeed! It's working!
Thank you Blazej! As always your bring things to work !
domo.

I can confirm this bug, also check the size of cached memory: it's huge!
Memory usage without expression is normal.

Appears to only happen for me when I reference the same node, I will submit this to dev team.

Thanks