[Question] What is the effect of relationship status on EA impact?

Suppose I am trying to optimize purely for altruistic impact , should I stay single or pursue a romantic relationship? Is there any relevant social science on the casual effects of each on productivity?

Intuitively, it seems like being single would be more useful since you would then have more time to dedicate to work. On the flip side, being in a relationship might help cut costs enabling more donating and could increase happiness to have an indirect effect on productivity?