more efficient - filter or customiser

before purchasing GP premium, I set up some filters / functions for specific things

e.g. to hide the author on the posts I put this in my child theme functions.php

add_filter('generate_post_author', 'mc_generate_post_author');
function mc_generate_post_author() {
	return false;
}

Now with GP premium I can go to customise / layout / blog and untick 'Display post author'

Which is more efficient in terms of code size / speed etc? (not just for that example but in general)

I'm perfectly happy writing the filters and functions - I just needed the GP premium to get all the hooks I needed

Thanks