I’ve been seeing a lot of red balloons too, and most importantly, sometimes my IDE freezes when I have a lot of grammar errors(like when I just copied a big chunk of Java code to Kotlin). recently, I’m also experiencing frequent high CPU usages(>50% constantly until I closes IDE window) and even typing became sluggish. tried changing vmoptions for a larger heap, not working. tried switching to Oracle JRE(because the IDEA bundled JRE doesn’t have FlightRecorder, and I don’t know how to profile it), the problem became less severe but still not completely go away. tried deleting vmoptions, still see some CPU spikes occasionally.
running on OSX 10.10.5 on a 2014 model Macbook Pro, IDEA 2017.3.3