ion_auth's 1.2mb memory usage

Hello,

I'm a happy user of Ben Edmunds ion_auth.

I was profiling my app, and ion_auth costs 1.2 mb memory on top of my exisiting app, for each pageload
Cant do a better job for the auth part of then ben's ion auth, but i think it's maybe a bit overdone for my application.

4 options to share
a) 1.2 mb isnt a problem at all!
b)  only use this library when a user go's for example to /login , and to check if a user is logged in, make a simple rewrite of
ion_auth->logged_in, so you can skip loading the whole ion_auth library
c) use another auth library below 1.2mb memory usage
d) use an external login API ( i recently only used Instagrams auth api and stored the session in my database)

Best !