[jesterson]

It depends on people.

I was in your shoes once, decided to share and regretted. The moment I did, employer was under constant stress of me leaving and it caused of lot of unpleasantries.

My take is - do your honest job and when you are ready to dedicate yourself to your own project, tell your employer. Obviously it shouldn't be like "I wouldn't be coming tomorrow", you need to give reasonable time margin to have a mutually nice departure