The issue of speeding up compilation

[WZDDZFJ]

Dear Professor He
I am currently using the v3.1.2 version of dafoam. I would like to ask you a few questions:
1. If I only modify the files in dafoam-main, do I need to recompile openfoam?
. $DAFOAM_ROOT_PATH/OpenFOAM/OpenFOAM-v1812/etc/bashrc
./Allmake 2> log.txt
. $DAFOAM_ROOT_PATH/OpenFOAM/OpenFOAM-v1812-ADR/etc/bashrc
./Allclean
./Allmake 2> log.txt
. $DAFOAM_ROOT_PATH/OpenFOAM/OpenFOAM-v1812-ADF/etc/bashrc
./Allclean
./Allmake 2> log.txt
pip install .
Can I skip the bolded section without modifying it and run pip install . directly? Because this will greatly accelerate the compilation speed.
2. I'm a bit unclear about the specific difference between OpenFOAM-v1812-ADR and OpenFOAM-v1812-ADF, because I saw that you only uploaded the OpenFOAM-v1812-AD package. Are they just different in the OpenFOAM-v1812-AD/etc/bashrc file?
3. If OpenFOAM-v1812-ADR is modified, where should it be compiled? Because I only see that to compile dafoam, you need to put the newly modified files in the repos folder.
The above three are my questions, and I really need your help. Thank you very much.