Minifying absolutely affects performance in this case. In my case only on Galaxy S6, OP is also testing it on a Samsung phone,so that is why I jumped in with my example.
Minifying essentially removes whitespace and renames variables to shorter names. So there is no functional difference and no technical reason why this would affect performance. I'll believe it if you provide a project and benchmarks that I can replicate. It's also very common for people to mis-attribute the cause of sporadic issues.