Hi @kristina258,
I have also tried with kamailio 4.4 but unfortunately this time I get 1min7 secs for the approx 500k entries in carrierroute tables created with kamdbctl tool. I don't know if I am doing something wrong as I don't have experience with postgres, but for me kamailio dev vs kamailio 4.4 are more ore less similar as far as load times are involved.