Displaying page content takes too long

As the title says… I’m writing an app that shows a list (no one of the pages) of orders from a WooCommerce store. I log to the console the data and I can see when it’s already loaded but from that point takes a long time to display the content. This works fine when using ionic serve but when running the app on an emulator or real device takes a lot to show the content.

Your template is doing too much work.

I don’t think so because in the browser it shows pretty fast. This only happens on an emulator or a real device… Even when I press the back key on my phone it quickly display the content of the page…