Question: When do you usually introduce a new partner?

Been dating someone seriously for 4 months. My kids are 6 and 9. Too early? My ex started dating like 2 months after we split and had her boyfriend around constantly which drove me up the wall. I don't want to be that guy but also don't want to rush it.

What's the general consensus here? Is there a "right" timeline or is it just case by case?