Does religion really matter when finding a partner??

I have noticed that there are some churches that don't allow couples with different religion to get married. And I think because of that, people would have second thoughts of having a relationship with someone who has a different religion as theirs. Some people would say that if both parents have different religion it might cause a confusion on the beliefs of their children someday. I myself think that it could also be quite hard someday if you have relationship with someone of different religion because all those time you have spent together might just go to waste if the church won't allow you to get married. I'm not quite sure if it happens quite often in real life where people were not allowed to get married because of having a different religion. How about you? What do you think about this? Would having a different religion matter to you when finding a partner?