Do Feynman diagrams reduce computation? my understanding is that Feynman diagrams are a clever simple way to document particle interaction. That is, more for human consumption than machine. My gut tells me it is the same as saying "we were able to reduce the computational complexity of our simulation because we had a good flowchart", by which I mean, It may help, but the flowchart is not the code(yes, uml, I am looking at you)