how to decrease compile time.

What device is it? how full is the device? what effort level are you set to? have you set quartus to use multiple CPU cores?

Things that increase compile time are:

- More code

- larger devices

- larger % of chip used (I think if it goes over 70% full, compile times start to go up a lot)

- tight timing constraints.

- running out of ram (though 24G should be plenty)

The basic answer is get used to it. Unless you get a faster machine, the more you add to a chip, the longer the compile takes. (with my current design, a single build takes 5.5hrs, and it always fails timing!)