>>13457691Just to add to this anon, you should consider that engineering and computer science will both be much more likely to have project-based work (in fact, mathematics will likely have none).
Project-based work can add working hours for obvious reasons (though these projects will often be worthwhile).
If you are US-based, another thing to consider is that many engineering majors have increased credit hour requirements relative to other majors. Labs, ethics classes, whatever -- these things add to the workload.
Of course you should pick whatever best matches the life you want long-term. Mathematics is all proofs and p-sets. 1 hour to move just a few pages in a given book. You can take your work with you and think while taking a nice walk. Engineering is going to be a lot of labs and project-work, plus some more "can you calculate?" style p-sets. A decent chunk of the work that matters in the course is not portable like a math problem: you need to have access to materials that you can play around with. Computer science is somewhere in between but probably closer to the math end, since you can think as much as you want up until you actually have to write code to see if you can accomplish some task (and even then, you just need a laptop).
I think mathematics is the most based major, but realistically most math majors wind up programming for a living, so you may as well take at least some CS or CompEng courses and do something close to the metal so that you can avoid writing React apps for the rest of your life.
As a final warning, if you have any interest in any kind of specific engineering job ("I want to build rockets!"), you need to take the engineering major unless you are going to be content doing numerical simulations or something. There are exception to everything, but it is very hard to go from "bits to atoms" in terms of a career.
