magento2 – Is it possible to load the "Checkout One – Step" page in php and without JavaScript to optimize the loading time?

Currently, all the content of the extraction is loaded by a function called getJsLayout () of the class Checkout. But the loading is very slow, the loading of the page takes at least 30 seconds and it gets worse if the speed of the internet is slow.

I'm analyzing the possibility of getting all the contents of the crate that can only be loaded with php, without it being necessary to use the getJsLayout () function, so that the content loads instantly with the page. You can therefore optimize the loading time of this page.

The problem is that I have been working with Magento 2 for only 3 months and I must always ask for help. If anyone can help me with that, I would really appreciate it!