6.5.4 Speed Up Build Times
Depending on the configuration of your computer, you may be able to use parallel make (see 14.26.2 Project Options Tab) to speed up your project build times. Not all language tools support parallel make.
Another option is to consider your operating system (OS). Some OSs have faster file accessing. MPLAB X IDE supports Windows OS, Linux OS and macOS. Research which one might be right for you.