Plain-jane Eclipse works better for me than IDEA for my hobby Java coding. On my late 2015 Mac, Eclipse much snappier and the font-rendering is better. IDAE takes 3+ mins to launch. Eclipse takes 20s on a cold launch. To be fair I am not using any plugins and not doing any JEE stuff.
I just can't get IDEA to respond to clicks in less than 10s. There's obviously something wrong with my setup.