How much faster in symmetric cryptography compared to asymmetric cryptography? I know that symmetric cryptography is faster than asymmetric, but on average how much faster would it be if you were encrypting and decrypting a 2MB file?
The page https://www.cryptopp.com/benchmarks.html has a comparison of the speeds of a number of different algorithms.  You will have to do a little math to covert to the time necessary to encrypt a 2MB file, but this should give you the base information necessary.