replied on January 31, 2014
how many options will show up when a user tries to open the dropdown menu for this dynamic field?
I think I read somewhere on Answers that the limit was 10,000 items and even with that, the larger it is the more slowdown.
I think the recommendation in that situation was to break down the dynamic field(s) further into a parent field that contains maybe the first letter or first two letters of your various options and then after you have chosen that, the options starting with those letters appear in the next metadata field. This would reduce the amount of delay/slowness you are experiencing as well as make it easy for user to get to the option they actually want to pick.