what I can see, the problem is with a table itself:
my table has 41 columns and 18 rows.
5 rows belongs to header section, remaining to data section within the table.
Generating such table - totally empty, without any logic - this itself take this long time (over 30sek, which is very strange to me).
I have another report, where the columns are dynamically created (the table is dynamically expanded), then it goes immediatelly, even much bigger tables.