Today I upgraded from OSX Sierra to High Sierra. Everything ran smoothly, until I opened PhpStorm. Suddenly, the system started lagging badly. Switching tasks between PhpStorm and other apps (Chrome) took 2-3 seconds. Switching between editors inside PhpStorm took 1-2 seconds.
I noticed, that the CPU usage of PhpStorm went up to 50%-80%, when moving the cursor in PhpStorm or when switching between editor windows. Indexing a project completely freezed the system with a CPU usage of 600%.
Then I uninstalled JAVA and JAVA SDK and rebooted. Suddenly everything ran fine, even in PhpStorm.
But now I have PhpStorm (EAP 2017.3 Build #PS-173.3531.17) open for almost an hour, and the lag when switching tasks/editors starts to appear again. It's almost impossible to work.
I also tried PhpStorm 2017.2, but same problem there.
Any ideas how to fix this?