Page Transition not smooth

I’m new at Ionic and Angular.
I’ve created an app with Ionic and Angular and my app contains many large images on each page. So when click a button page transition (left-right) lagging and not smooth or low fps i can’t explain sorry my poor English.
Is there any way to handle this?
Maybe load all contents at start but i’m searched about 3 days and can’t find solution,
Maybe set transition to fade-in-out , I couldn’t this anyway.

Could you provide a codepen demo?

actually i don’t know how to use codepen for my project, as i say it’s containin many images and all of these are relative images.
Just let me know anyway to cache images before load?