Apps
ideaJetBrains IDE
● Safe to close
A code editor such as IntelliJ IDEA, PyCharm or Android Studio.
What it is
JetBrains editors run on Java and can use several gigabytes while indexing a project.
Why it might be busy
While indexing a project after opening it or updating. Usually a few minutes.
If you close it
It asks you to save unsaved files. Builds and terminals inside it stop.
The verdict
● Safe to close. An app you can quit with ⌘Q. Save your work first if it asks.
In Activity Monitor
ideapycharmwebstormgolandriderclionphpstormrubyminestudio
From Procession’s guide, in the words the app shows.