There is a known issue with JDeveloper 12c while working on a BPM Process where JDeveloper becomes very slow while editing the process.
A simple drag and drop of an activity or a data association becomes a real pain and it seems as if JDeveloper is constantly working on the background.
To improve this I have two suggestions. The first one will not solve the issue but will help. The second will take away all your frustration!
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