FileMaker Inc has released the a revision for Mac and Widows for both for Client and Advance

FileMaker, Inc. has released FileMaker Pro 12.0v3 and FileMaker Pro 12.0v3 Advanced. This update addresses issues regarding layout design and rendering, printing, plug-ins, scripting, container fields, portals, and more.

http://thefmkb.com/11239

Stephen

The update documentation specifically mentions the performance of conditional formatting calculations when rendering a layout. I had run a test in v2 with this conditional formatting calculation on an otherwise blank layout in form view:

Let ( $$i = $$i + 1 ; False )

And this script:

Set Variable [$$i; Value:""]

Refresh Window []

Show Custom Dialog ["$$i: " & $$i]

In FileMaker 12v2, $$i was 4 at the end of the test, indicating that one window refresh caused the conditional formatting calculation to evaluate 4 times. In FileMaker 12v3, $$i was 1, as it should be.