Performance drops down with increased complexity

Hi,
first of all let me thank you to the Caldera team for great form plugin. I have chosen it since it offers a way to make powerful and complex forms.

I have played with it for several nights 😀 I had everything what I needed in my head (like a poem) but I didn’t have tools to do it, not until I found Caldera.

What is problem then?

Well as title says. For some reason if form is complex, then performance of the page degrades so badly that it is impossible to fill in forms.

This was my first attempt: http://www.ahlanbosna.com/en/booking/
you will notice on 2nd page that is almost impossible to fill in data in to the form fields. This form has 4 pages, 46 fields and 13 logic condition groups (I turned off almost all “required” condition, thinking it will make some change).

Then I split form in two, one page just for basic user information, and then I would redirect to another form for services. But already first form feels laggy and I did not continue with 2nd part of form (just basic content field to display passed data).

This is second attempt: http://www.ahlanbosna.com/en/reserv_step1/

Is this a bug?
Are there limitations or field types that impact overall JavaScript performance?

Help is highly appreciated,
Thank you.