Re: MPLABX V5.05 IDE Running too slow :
☄ Helpfulby follower 2019/02/01 02:04:51
The RAM is huge. 4G will run MPLAB X, but if you want to do real work (like Harmony), you need to bump up to 8G. And, as already mentioned, make sure your virus checker is not scanning every file MPLAB X opens. MPLAB X opens and re-opens repeatedly a lot of different jar files. Virus checking will bring MPLAB X to it's knees.
Also, while not official yet, you can likely expect a statement, probably by the end of the year, indicating that future versions of MPLAB X will only work on 64 bit systems. :)