I have never had the need to check for those numbers in agio, so I don´t know what mine are, and can´t test at the moment, because tractor is in house.
But as you have found out now, it is not a CPU problem, so what is your GPS setup?
If F9p is outputting all sentences, then system AOG V5 will slow down. You only need Gga and vtg to be active.
AOG V4 worked fine with all!
Here is link for setup of F9p: Improved konfiguration files for f9p with firmware 1.13