The CtrlP's default file mode is too slow when I open CtrlP in the root of my $HOME dir. it is due to that there are too much files and dirs in my home dir.
I have speeded up the scanning according to this answer by using ag
command instead. However, the scan speed is still slow.
So, I want to set the MRU mode as the default mode of CtrlP. How to do that?