I have created a report that displays with some delay the results of it's calculated fields. It's about 15-20 seconds delay that I assumed was due to too much computing effort. I thought it was normal because, during this time, simple arithmetic operations were performed with about 20,000 records. So I focused on finding ways to speed up this process but, to my total stupefaction, I accidentally spotted that if I click on the calculated fields, the results are there, without any delay. Please help me understand what's going on and how I can "convince" those fields to show the results when they are available, without this weird delay.