Hi all!
Thanks for all the insights on what is causing this slowdown.
I also get a fatal error after 30sec. waiting for the page to update.
I have a repeater in a repeater which has also a repeater. First it had also a true/false condition but after removing that there was only a minor speed improvement.
Is this going to be resolved in version 4 or should we just jump on version 5 and never look back?
(I have ACF v4.3.5 and repeater v1.1.1 and wordpress 3.8.1 and I am running my own custom theme.)
Success!