Anyone willing to drop some learning on a lay person? Is encrypted data less compressable because it lacks the patterns compression relies on?

Or, is it less secure encrypt first because smart people things? I know enough about cryptography to know I know fuck all about cryptography.

It’s not compressible at all. You will end-up with a file that is larger than the original.

Whether compressing before you encrypt leaks information, or not compressing is what leaks, or it’s irrelevant is complicated to decide and depends on the details of what you are doing. But encrypting and then compressing is a bit worse than useless, and always a mistake.

Also might be faster to encrypt a compressed file, since it will be smaller?