Is that for your benefit, or your users? Either way is a good answer, I just think you should know the answer. The word "believe" prompted this comment.

If you have icons 1-10 on tab A, and icons 11-20 on tab B, then tab B loads really, really slow, i.e. never until you click it. So you have fast access to icons 1-10 and really slow access to icons 11-20.

An option in the Settings would (eventually) be good.