Herman - what types of calculations are being performed? Is it possible to break the form up into a number of separate forms? 500 fields is a lot for one form and, if any microflow based calculations are performed, will likely take longer than acceptable for users. For many form purposes, you can use built in functionality like constrained by and xpath constraints to implement form functionality. These built capabilities are far faster than microflow based constraints, etc. Hopefully there is something helpful in my response.
Mike
Hi Mike,
Thanks for your answer. From another collegue I got extra information. For mne this problem is now solved. Thanks!