How to speed-up Ortools during creation of variables

I have a very large problem and I am facing computational time issues even in the declaration of the variables in OrTools (>10minutes).

Here is a peace of my code

x = {}
for i in setI:
    for j in setJ:
        x[i,j] = model.NewIntVar(0, 1, 'x[{}]'.format([i,j]))

If a create the same variable using Pyomo I do not face this problem, I believe I am doing something wrong.

Can someone, please, help me to improve the performance of my algorithm?

Thanks